and it is important once it had that that the government acted on it i as swiftly as possible. of course i know thei timing is frustrating. but i want to give people a sense of the scale - of what we are grappling with here. there are around 22,000 schools. in england and the important thing to know is we are expecting 95% of those schools will not - be impacted by this, i around 50 schools have already been mitigated. another 100 are in the process of being so. . 0ur expectation is in a matter- of weeks the bulk of the remaining schools that will have this issue will be identified as well. - also an important context to know is that in many cases this could be limited to a single classroom i for example, so people should have a sense of scale of what might be happening as well. _ earlier, a former top civil servant at the department for education accused mr sunak and the uk treasury of refusing to fund school repairs adequately, despite being warned that lives were at risk from crumbling concrete. jonathan slater spoke earlier on the bbc radio's today programme. the spending review was completed a year after i left the department, and i was absolutely amazed to see that the decision made by the government was to halve the school rebuilding programme, down from 100 a year to 50 a year. to be clear then, in the department you were saying we need to rebuild 300 to 400, it became 100 a year. after you left the department it went down to 50 a year? yes, to be clear, we knew what we needed, 300 to 400. there is only so much capacity in the construction industry, there is disruption if you close schools and rebuild them. so the actual ask in the spending review in 2021 was to double the 100 to 200. that's what we thought was going to be practical in the first instance. i thought we'd get it. but the actual decision that the chancellor took in '21 was to halve the size of the programme. butjust what is the concrete at the centre of this saga? raac, to give it's full name, is reinforced autoclaved aerated concrete. it's a lightweight concrete that was used in roofs, floors and walls between the 1950s and 1990s. it's a cheaper alternative to standard concrete because it's aerated, or "bubbly". however, it's less durable with a limited life span of around 30 years, and its structural behaviour differs significantly from traditional reinforced concrete. the health and safety authority says raac is now beyond its life span and may "collapse with little or no notice". to tell us more about it we can speak to chris goodier. he's a professor of construction engineering and materials at loughborough university. thank you forjoining us, chris. tell us more about raac. figs thank you forjoining us, chris. tell us more about raac. as the name su: nests it tell us more about raac. as the name suggests it is — tell us more about raac. as the name suggests it is made _ tell us more about raac. as the name suggests it is made in _ tell us more about raac. as the name suggests it is made in a _ tell us more about raac. as the name suggests it is made in a pressure - suggests it is made in a pressure cooker_ suggests it is made in a pressure cooker when it is cast. it is aerated _ cooker when it is cast. it is aerated and has reinforcement, steel reinforcement which does the bulk of the load _ reinforcement which does the bulk of the load carrying. but it is concrete. _ the load carrying. but it is concrete, there is nothing too special— concrete, there is nothing too special about the material. you — special about the material. you have _ special about the material. you have some with you, to explain what the concerns are after a certain point in time. i have a piece here, as you can see it is fairly— i have a piece here, as you can see it is fairly lightweight, half the density— it is fairly lightweight, half the density of water, a quarter of the weight— density of water, a quarter of the weight of— density of water, a quarter of the weight of normal concrete. there is a reinforcement going through which is a criticai— a reinforcement going through which is a critical aspect, that is what takes _ is a critical aspect, that is what takes the — is a critical aspect, that is what takes the load. the aerated bit is a distraction. — takes the load. the aerated bit is a distraction, that does not carry the load, _ distraction, that does not carry the load. it— distraction, that does not carry the load. it is— distraction, that does not carry the load, it is these steel bars. the problem — load, it is these steel bars. the problem we have is back in the 19605 a small— problem we have is back in the 19605 a small proportion wa5n't manufactured very well, maybe the bars were _ manufactured very well, maybe the bars were slightly in the wrong place — bars were slightly in the wrong place. when it was installed, this would _ place. when it was installed, this would be — place. when it was installed, this would be a — place. when it was installed, this would be a plank, it would be sat on a wall _ would be a plank, it would be sat on a wall. sometimes this bearing was not big _ a wall. sometimes this bearing was not big enough so it may be sat on a smaller— not big enough so it may be sat on a smaller ledge than you would want. that is— smaller ledge than you would want. that is the — smaller ledge than you would want. that is the main problem. over 30, 50 years. _ that is the main problem. over 30, 50 years. it— that is the main problem. over 30, 50 years, it has not always be maintained well, flat roofs are notorious _ maintained well, flat roofs are notorious for not being waterproofed or maintained, some have been overloaded, with extra weight. hence it has— overloaded, with extra weight. hence it has deteriorated faster. that — it has deteriorated faster. that is _ it has deteriorated faster. that is really useful, just showing us how the concrete works with bricks or other structures. one question a lot of viewers will have is, is there nothing that can be done to actually extend its life span or make it good again? it can. the race is on to find where the raac_ it can. the race is on to find where the raac is— it can. the race is on to find where the raac is and assess it. most raac will be _ the raac is and assess it. most raac will be ok_ the raac is and assess it. most raac will be ok and can be left and monitored over time. a small proportion will need to be strengthened and this can be fairly straightforward by strengthening as i straightforward by strengthening as i have _ straightforward by strengthening as i have explained, this crucial part of the _ i have explained, this crucial part of the structure, you can add localised _ of the structure, you can add localised strengthening and in some cases— localised strengthening and in some cases that _ localised strengthening and in some cases that will be enough. in other cases— cases that will be enough. in other cases you — cases that will be enough. in other cases you may need to strengthen the whole _ cases you may need to strengthen the whole roof— cases you may need to strengthen the whole roof underneath with additional steel support. in some cases— additional steel support. in some cases it _ additional steel support. in some cases it may be more economic to take the _ cases it may be more economic to take the roof off and add a new one. it is case—by—case assessment, it depends— it is case—by—case assessment, it depends what you are doing inside the room. — depends what you are doing inside the room, how long you want the building — the room, how long you want the building to — the room, how long you want the building to last. a lot _ building to last. a lot of parents watching with children at schools that may be at risk, they will want to know if they are found to have raac, how long might it take to remove and replace it, how long might it take to make good, or is it likely some school buildings could be condemned? i have two primary schoolchildren, they are _ i have two primary schoolchildren, they are at — i have two primary schoolchildren, they are at sacred heart in loughborough. their school is made of timber. _ loughborough. their school is made of timber, so they are fine on this. those _ of timber, so they are fine on this. those schools with raac, i would say, rest — those schools with raac, i would say, rest assured at the moment the dfe has _ say, rest assured at the moment the dfe has taken a safety first position— dfe has taken a safety first position and not send children in until— position and not send children in until experts have been sent in to assess— until experts have been sent in to assess them. an engineering surveyor will assess— assess them. an engineering surveyor will assess the raac and i do say it is 0k— will assess the raac and i do say it is ok because they think it is structurally sound. all it will need strengthening. it will be a small portion— strengthening. it will be a small portion of— strengthening. it will be a small portion of closed schools that need additional— portion of closed schools that need additional strengthening. as i said it depends on the extent of that. if your school— it depends on the extent of that. if your school is, well, none of them aren't— your school is, well, none of them areh't new. — your school is, well, none of them aren't new, these old schools built in the _ aren't new, these old schools built in the 19605. a decision might be made _ in the 19605. a decision might be made they— in the 19605. a decision might be made they might spend £100,000 on strengthening the corners. it might be let— strengthening the corners. it might be let as _ strengthening the corners. it might be let as spend 200,000 on strengthening the whole roof. it might _ strengthening the whole roof. it might be — strengthening the whole roof. it might be a case of spending 400,000 on putting _ might be a case of spending 400,000 on putting a new roof on. there figures — on putting a new roof on. there figures depend on the size of the school— figures depend on the size of the school as to how long that would take _ school as to how long that would take it — school as to how long that would take. it might not be all the roof, it might _ take. it might not be all the roof, it might be — take. it might not be all the roof, it might be one classroom, it might be the _ it might be one classroom, it might be the gym, it might be just one room _ be the gym, it might be just one room and — be the gym, it might be just one room and hence it will be very quick — to westminster now where we can speak to our political correspondent rob watson. we were talking about the comments from the prime minister rishi sunak. how much does this development, when he was chancellor at the time, with accusations he did not properly fund dealing with this problem, how much does this lie on his doorstep? it is not massively helpful for him, to state the obvious. the bigger problem is the british voters, where everything in britain is rubbish, transportation, wherever you look, they then ask themselves who has beenin they then ask themselves who has been in powerfor13 years, the conservative party. it is that overall narrative that is probably more problematic for rishi sunak than any arguments over his precise role in whether schools should have this funding or should not have done. what do we know now about how many schools are impacted. the education secretary gillian keegan has been on the airwaves today but we still do not have a clear number. we should have a clearer number, she said, by the end of the week. it was last thursday the department for education announced there were 150 schools identified as potentially having a problem with raac, and we will get a greater sense of that later. there is a contrast between rishi sunak saying, hang on, remember the scale of this, it is 22,000 schools in england, only 95% of them not affected at all. but then you heard from the senior official saying the department for education had asked for the money to start rebuilding and repairing up to 400 schools a year, not the 50 dishes sunak had budgeted for. i go back to the point, the biggest dangerfor the back to the point, the biggest danger for the government is that sense of, goodness, something else has gone wrong, who will we blame, the government. what assurances have there been for parents who have children at schools that might be impacted? the general assurance from the schools and department for education is what we are doing is being overly cautious. if there is the slightest risk, we want to be aware of that, so that is the approach being taken, and absolute caution first. the point the opposition parties have been making is, we have known about this problem for decades, most intensively since 2018, was it acceptable to be closing schools and taking action onlyjust now as a school is about to start? there is plenty more on the bbc news website. the mp who was at the centre of a scandal which led to the downfall of boris johnson as prime minister is facing an eight—week suspension from parliament. the british parliament's standards committee found former government whip chris pincher guilty of an "abuse of power" and "completely inappropriate" behaviour, after he was accused of groping two men at a london club last year. his appeal against the ruling was rejected. the israeli military has carried out another raid into the city ofjenin, in the occupied west bank. the operation is one of the first of its kind since israel carried out a military assault on the refugee camp in the town early injuly. the refugee camp has been established for several decades, and is considered by israel to be a stronghold for militant groups. palestinian organisations have accused israel of using armed forces to kill civilians there. turkish president erdogan met with his russian counterpart putin in sochi — aiming to persuade him to return to a ukraine grain export deal that helped ease a globalfood crisis. mr erdogan said the ukraine grain export corridor was the most important issue in the talks — and that the message after the meeting would be a very important step. around the world and across the uk, this is bbc news. let's look at some other stories making news. a bullying complaint against former cabinet minister gavin williamson has been upheld by an expert panel in parliament. mr williamson — who quit the government after the allegations emerged — has been told to apologise to the commons. the complaint was made by former government chief whip wendy morton and was related to the allocation of seating at the queen's funeral. the parents of a teenager who died after failures in treating her sepsis are calling for patients to be given the right to an urgent second opinion if they feel their concerns are not being taken seriously. martha mills, who would have been 16 today, died two years ago. an inquest said she could have survived had her care been better. tesco's chief executive says staff will be offered body cameras because of a rise in violent attacks. physical assaults have increased by a third since last year — and earlier this year british retail consortium found abuse against retail staff had almost doubled compared to pre—covid levels. similar action has already been taken by sainsbury�*s, waitrose and co—op. you're live with bbc news. now to ukraine — where president zelensky has announced he's replacing the country's defence minister saying it's time for a new approach. oleksii reznikov had been in post since before the start of the full—scale russian invasion in february last year. his removal is thought to be part of mr zelensky�*s determination to tackle corruption in all government departments. president zelensky has nominated rustem umerov, who's currently in charge of ukraine's privatisation programme, as the new defence minister. here's mr zelensky giving that update. translation: this week, _ the parliament will be asked to make a staff—related decision. i would like to outline it now. i have decided to replace the minister of defence of ukraine. oleksii reznikov has been through more than 550 days of full—scale war. i believe the ministry needs new approaches and other formats of interaction with both the military and society as a whole. live now to mykhailo samus who is the director of the new geopolitics research network. thank you forjoining us, what do you make of this change in the defence ministry? actually as you heard mr reznikov was appointed before the full—scale russian invasion and made a great job of organising supply of ukraine with support and weapons from allies and partners and he made a greatjob getting support including armoured vehicles, tanks and missiles. but there have been journalist investigations in the ministry of defence over corruption. i think the demand from society that there should be changes in the ministry and i hope the new minister will focus more on the internal organisation of the ministry of defence, continue active participation in foreign processes supporting ukraine. how do you think he might strategise in this ongoing counter offensive? in the ukraine ministry of defence, he is responsible for supporting the armed forces to allow the armed forces to complete their missions as effectively as possible. i am not sure there will be an impact on the activities, because the generals are responsible for all of operations. i think it will be a small effect on the activities of the armed forces. and how will this perhaps impact the relations that ukraine has with other countries around the world, particularly when it comes to asking for material help when fighting the war? now we have a very effective system. we have heard about the bilateral support, for example with the uk. i think it won't be any significant change. our new minister, his task is to continue what mr reznikov built, and of course make it even more effective. thank you for sharing your insights. meanwhile ukraine's generals are reporting significant progress in the counter—offensive against russia's invasion. they say their troops have breached the first line of russian defences in the south, near zaporizhzhia. the generals said extensive minefields had blocked troops for several weeks — leaving them vulnerable to russian shelling. but they say that painstaking mine clearance has now allowed the forces to advance. kyiv says its forces are making gains in the south of the country — and has in recent weeks expanded its units towards the strategic town of tokmak — a logistical centre for russian forces. kenya is hosting the inaugural africa climate summit to discuss how the continent can take climate action. at least 23 african heads of state and government willjoin thousands of delegates to discuss a problem that is affecting the whole continent. ethiopia, kenya and somalia recently endured its worst drought in decades — with five consecutive failed rainy seasons. one of the deadliest storms to hit africa in the last two decades, cyclone freddy, ripped through malawi, mozambique and madagascar in late february, killing over 1,000. west and central africa experienced one of the worst flooding disasters ever in 2022. more than 1,500 people were killed and 3.2 million displaced. our africa correspondent anne soy is following developments from nairobi — and i asked her to talk me through what the organisers of the summit hoped to achieve. at the end of this three—day summit, the kenyan president hopes that the delegates will have agreed on the solutions that they will be taking to the table during cop28, the un climate summit, upcoming in november in dubai. and so, as you say, he is trying to strike a positive tone to this and saying that they are not here to list grievances. they are not here to just talk about being a victim. this is a region that contributes least to climate change, but suffers the worst impact of it. and so they say everyone knows that. now, can they discuss solutions? and he is saying that africa has much of the unused arable land. if it was turned into agricultural productive land, this is a continent that could feed itself and feed the rest of the world. he is looking at the minerals that are on the continent, coltan and lithium that are used to manufacture batteries for electric vehicles. that can leapfrog that revolution towards green energy. this is a country that is already a leader in that. 93% of energy in kenya is from renewable sources. however, it has also faced controversies because it wanted to start exploiting coal, because it's talking about wanting to get industrialised, and that is why we have activists here as well to just make sure that the political leaders who are showing some political will do not also backslide, so to speak. so, there is a lot of discussion that is going on here. the kenyan president wanted to be about solutions, rather than complaints. thousands of teachers in south korea are going on strike and attending a mass rally to honour colleagues who've taken their own lives. school staff are demanding better protection against bullying by the parents of pupils after a young teacher died by suicide injuly. our correspondentjean mackenzie is at a demonstration in in seoul and she gave me this update. this is now the seventh week that teachers in seoul have been protesting. throughout south korea they have been coming here to protest every single weekend. it has culminated today in this national strike of teachers. at the weekend we saw 100,000 teachers take to the streets. this all started with the death of a young teacher, a 23—year—old, back injuly. the young teacher died by suicide. it emerged after her death that she had been suffering with pressure from work but that she had also been dealing with complaints from parents. what this did here is it has open this pandora's box where teachers across the country are starting to share their own stories about how they have frequently been harassed by parents calling them at all hours of the day on their mobile phones, at weekends, complaining. essentially they say they are overbearing parents who are completely fixated on their children's success at school. and some of these complaints are serious, that teachers are having to deal with. the teachers say that they can be accused of child abuse if they try to restrain violent children or they try to send children out of the class, and they can be accused of emotional abuse if theyjust tell children off. so they say it has reached a point where they don't even feel safe to teach or discipline their children. and before we go let's show you this spectacular pictures from venice. it's the annual venice regatta which sees dozens of the traditional gondolas filling the grand canal. thousands of people lined the banks of the canal to watch the parade which dates back to the 13th century. the event is one of the venetian highlights of the year and celebrates the era when venice was one of the most important maritime cities in the world. three astronauts and a cosmonaut have returned to earth with a splash from the international space station. stephen bowen and woody hoburg from the united states, sultan alneyadi from the uae, and andrey fedyaev from russia came down safely in the atlantic ocean off the coast of jacksonville, florida. teams on the spacex recovery ship, including two fast boats, now are in the process of securing dragon and ensuring the spacecraft is safe for the recovery effort. a classical music festival in denmark has opened with some canine additions to the orchestra. take a listen to this. barking in time with music. three dogs participated in the performance near copenhagen of the hunting symphony, a little—known piece by mozart's father, leopold. the chief conductor auditioned dozens of dogs for the part. he said he was complying with the composer's express wish that six bars of the symphony should be accompanied by baying hounds. hello, again. for most of us today, it's going to be dry, sunny and warm. and in fact, as we go through this week, if anything it's going to turn warmer and also more humid from the middle of the week, notjust by day, but also by night. there'll be plenty of sunshine, but there's some mist and fog patches to clear first of all, especially first thing in the morning. high pressure is firmly in charge of our weather at the moment. we're pulling up this warm continental air, but we also have a weak weather front draped across the north of scotland. it's been with us this weekend. it's weakening today, but you could still see the odd bit of drizzle coming out of it in orkney where it's also going to be breezy in the northwest, and also the south. but for much of england, wales, northern ireland and scotland, dry, sunny and warm sums it up. temperatures ranging from 18 in stornoway, 27 in liverpool to about 29 as we push down to the southeast, possibly 30. now through this evening and overnight there will be clear skies. but once again we'll see some mist and some fog patches forming across northern ireland, northern england and also scotland. a few showers by the end of the night coming into the southwest. and we'll also still have our weak weather front across the far north of the country. now, as we head on into tuesday, you can see the showers in the southwest. they will clear away. high pressure still firmly in charge. our weak weather front is really dying in situ, so it's going to break up continuously through the course of the day. and what you'll find is there'll be bright spells of sunny intervals coming through. and when the mist and fog lifts, again, we're looking at another dry, sunny and warm day. breezier along the north sea coastline. so temperatures here right on the coast won't be as high. but once again, we're looking at a range of 21 in aberdeen to about 28 or 29 in the south of england. now in the middle of the week, the wind changes to more of a southerly direction. so we're scooping up all this warm or hot air from the near continent. we're likely to start on wednesday with some low cloud, mist and fog in eastern scotland and eastern england, and the mist and fog across the southwest pushing northwards across the irish sea. but most will have a dry day and a sunny day, and if anything, a warmer day, up to 31 degrees somewhere in the southeast. then beyond that, into thursday, friday, saturday and sunday, we still remain fairly settled. still a lot of dry and sunny weather, but it's starting to break down at the weekend from the atlantic. this is bbc news, the headlines. the international labour organisation says the future of millions of children is at risk as growing numbers are pulled out of school and into work. a bbc investigation finds that at least five women have died after family courts allowed fathers accused of abuse to apply for contact with their children. hunting of whales resumes in iceland — prompting the outrage of those who oppose this decision. let's turn now to a worrying development as the world faces rapid increases in the cost of living — an increase in the number of children forced into commercial sexual exploitation, or other harmful forms of work. the research has been carried out by the international labour organisation and according to their estimate, around 1.7 million children are involved in the practises. the ilo's director general said the situation was getting worse — and often it was down to the way families felt they had to respond to global inflation. in some families, it really does make the difference between having one meal a day or not. and therefore the temptation of bringing the young girl for example to the street or try to entice them to go for the sex work increases. and therefore increase the risk of sexual abuse, sexual exploitation and therefore the worst form of child labour.