hong kong is marking the 20th anniversary of the territory's return to chinese rule. president xi jinping will inaugurate the newly elected chief executive, carrie lam, after a flag—raising ceremony which is about —— is currently underway at victoria harbour. at the same time protesters are preparing to march in an annual rally to demand democracy. there we see the red and yellow flag marking this particular moment in the territory's history. and president xijinping is on the territory's history. and president xi jinping is on the first visit to hong kong as china's president. after the ceremony, there will be the swearing in of carrie lam, the city's first female leader. julia liu is with us are ready to talk to us. she is in hong kong are surrounded by some of the protesters there. the protesters are ready to make their voices heard? absolutely. we are in the middle of the crowd. there have been scalpels for more than an hour between the protesters who are trained to make their way to the ceremony. —— scuffles. they have been scuffling with police are being trained to move us along for the last few minutes, as well as the pro— beijing demonstrators, that you can hearjust pro— beijing demonstrators, that you can hear just by pro— beijing demonstrators, that you can hearjust by me. you can probably make out the hong kong and mainland chinese flags. they are also blasting patriotic music. the lyrics include loving the motherland and being proud of the chinese people. we are still stuck in the middle of that melee, although it is comes somewhat. but the leaders of the demonstration, that we can see that some of them have been taken away by the police. —— has calmed somewhat. it is just a short walk to wear the next chief executive, carrie lam, is being inaugurated. there will be trying to make their way closer to that convention centre. obviously, carrie lam, this isa centre. obviously, carrie lam, this is a historic moment for the territory. it is also an historic moment, of course... she has a lot of things phasing out when she arrives. what sort of leader will she had out to be? yes, carrie lam will be the first female chief executive of hong kong. she is the fourth one says 1997. she was a popular career civil servant. but since serving as chief secretary to the outgoing chief executive, she has become more unpopular. she has become more divisive. she is seen as a pro— beijing as. she has talked about wanting to heal divisions in hong kong. it is either divisions behind me. you are seeing it all around us. we are seeing the divisions between people who want greater voting rights hong kong and those who want to support the status quo. she will have a work about in terms of how she tries to bring those two groups together. friendly, with her reputation, it will be a difficult task. —— frankly. with her reputation, it will be a difficult task. -- frankly. july the first is a day of protest, anyway, isn't it, in hong kong each year? first is a day of protest, anyway, isn't it, in hong kong each year7m did not start out that way. it is the date when hong kong returned to china. it was headed from the uk to china. it was headed from the uk to china. it was meant to be a day of celebration. certainly, for many yea rs celebration. certainly, for many years now, it has become much more synonymous with the pro—democracy protests. that will be getting under way ina protests. that will be getting under way in a few hours, actually. if you can believe it or not, that is nowhere we are now. some of these protesters will join nowhere we are now. some of these protesters willjoin that parade, that protest, that'll get started in a few hours and will start from victoria park. xijinping is expecting to leave the city before the process starts. no doubt, he will know about what is happening. he also knows about the small—scale protests that started on monday before he arrived in the city. in those other protests, there were some two dozen people arrested in that area, where we have seen the flag spring —— flags being raised. they have since been released. but that has obviously ratcheted up the tension. yes, joshua wong, the leader of the protests in 2014, and was arrested, sparking off the unprecedented days and ways of protest. that was here. i don't see him at the moment. it is possible that he has been removed by the police. but he was one of the leaders of this protest from this area to bat flag raising ceremony. he was one of the 26 people arrested at that location. what they have done is a had wrapped up a sculpture that china had presented to hong kong 20 years ago. they were arrested by police and health for more than a day. they were released yesterday. —— held for more. they are told that they are likely to be charged in september. we must leave you there. thank you. in other news, the time for strategic patience is over. that was the message donald trump had for north korea as he stood side by side with the new south korean president. mr trump called for a determined response to the nuclear threat posed by kim jung—un but he also took aim at seoul over trade and sharing the cost of defence. the bbc‘s state department correspondent barbara plett usher reports. this was the visit of a strong and historic ally at a time of uncertainty, with a recently elected leader and an unpredictable one. it was the first foreign visit for president moon. the interest back home spurring an eager scramble for the best shot. easy, fellas. hey, fellas, easy. perhaps a bit over eager. fellas, easy. the two men took each other‘s measure on the crucial topic of north korea. mr moon wants to engage the regime, mr trump wants to isolate it. but they emerged from their discussions calling for a determined response. the us president pressing for tighter sanctions to force north korea to end its nuclear weapons program. our goal is peace, stability and prosperity for the region but the united states will defend itself. always will defend itself — always. and we will always defend our allies. as part of that commitment we are working together to ensure fair burden sharing in support of the united states military presence in south korea. mr trump took aim at defence spending and unfair trade practices — he was very blunt about that. but for the south korean president, security in a dangerous neighbourhood was the main issue. translation: president trump and i agreed that only strong security can bring about genuine peace. we concurred to strengthen our overwhelming deterrence. mr moon threw in a line about dialogue with north korea but he did not emphasise it. both men are relatively new in office and they agree that they are facing a growing and significant threat from north so despite their differences in approach, they chose to use this first meeting to show a united front. president trump hasn't ruled out talks with north korea but given what's happened to 0tto warmbier, that prospect has become even more distant. his death after captivity has hardened attitudes here. the two presidents agree that china is key, like south korea, it advocates engagement but the us wants it to put the squeeze on north korea by cracking down on sanctions busters. washington did so itself, this week, penalising a chinese bank. the threat may be in south korea's backyard but it is the us protector who is setting the course for dealing with it. barbara plett—usher, bbc news, washington. the iraqi army says it will announce the recapture of mosul from so—called islamic state within the next few days. but for the moment fighting remains fierce, and the situation for civilians still trapped in the old city deteriorates further. 0ur correspondent nafiseh kohnavard has travelled to mosul and spoken to families who've fled the fighting, after being used as human shields. after nine months of fighting, there is now celebrations. the iraqi flag raised over what is left of the historic al—nuri mosque where the leader of the so—called islamic state once declared himself the ruler of all muslims. the security forces are close to pushing out the militants but the fighting is not over yet. the battle for old mosul continues. just 500m away from us in this direction, the areas that the militants occupy is getting smaller and as this happens, rescuing trapped civilians becomes extremely challenging. this is one group that managed to find safety. these children were held as human shields by is. most of them were living in an orphanage but the militants moved them closer to where the fighting was taking place. they are tired and hungry. transported here as is occupied their villages. the iraqi forces are now moving them out of the old city. the children are now being looked after by aid workers in a camp outside mosul. they will be safe but like so many here, the future remains uncertain. in new york, a gunman who opened fire at the city's bronx lebanon hospital has killed himself and one other person. the shooter, a former employee at the bronx lebanon hospital, also wounded six others, five of them seriously. police say he hid an assault rifle under a lab coat. the mayor of new york called the incident a tragedy of the sort seen around the country but this time, it occurred in a hospital. i want to say at the outset, thank god this was not an act of terrorism. it is an isolated incident. it appears to be a workplace—related matter but that makes it no less 0ne doctor is dead. and there are several doctors who are fighting for their lives right now, amongst those who are wounded. as you know, the shooter killed himself but not before having done horrible damage. our hearts go out to the family of the doctor who passed away and we are in both our hearts and our prayers standing in solidarity with the families of all those who are wounded, and all those who are fighting for their lives right now. you can find more information about the shooting on the bbc website. stay with us on bbc news. still to come: as hundreds of thousands of people prepare to gather in the canadian capital to mark the country's 150th anniversary, we'll be finding out why not everyone is celebrating. china marked its first day of rule in hong kong, with a series of spectacular celebrations. a huge firework display was held in the former colony. the chinese president, jiang zemin, said unification was the start of a new era for hong kong. the world's first clone has been produced of an adult mammal. scientists in scotland have produced a sheep called dolly that was cloned in a laboratory using a cell from another sheep. for the first time in 20 years, russian and american spacecraft have docked in orbit at the start of a new era of cooperation in space. challenger powered past the bishop rock lighthouse at almost 50 knots, shattering a record that had stood for 34 years. and there was no hiding the sheer elation of richard branson and his crew. this is bbc news. the latest headlines: just moments ago, the chinese and hong kong flags have been raised to commemorate 20 years of chinese rule in the former british territory. a warning to north korea at the white house. president trump welcomes his south korean counterpart, and makes clear there will be a determined response to the nuclear threat. the leader of the local authority in west london where at least 80 people died in a huge fire in a tower block earlier this month has announced his resignation. nick paget—brown said he had to accept his share of responsibility for the perceived failings of kensington and chelsea council in its handling of the grenfell tower disaster. earlier it emerged that the cladding used during a recent renovation was changed to a cheaper, less fire—resistant version. here is our home affairs correspondent tom symonds. were you pressured by number ten to resign? the pressure simply got too great. he was the leader criticised for failing to cope with a crisis in his backyard. his council quickly lost the confidence of grenfell‘s victims. chanting: we wantjustice! we want justice! two weeks ago, his council offices were invaded. and last night, he couldn't even hold a council meeting, after deciding that it wasn't possible to speak freely because journalists were in the room. in particular, my decision to accept legal advice that i should not compromise the public inquiry by having an open discussion in public yesterday, has itself become a political story. and it cannot be right that this should have become the focus of attention, when so many are dead or still unaccounted for. and this was the reaction to his resignation. it's good news, because people — there needs to be big changes made in the council, and this is at least a start. mr paget—brown claims no council could have coped with this. he thanks the community for its response, the emergency services, other london boroughs, but not the government. his deputy and his housing chief have also gone. investigations by the bbc and times newspaper into the decisions made when the council refurbished grenfell tower added to the pressure. the big change was the addition of aluminium cladding panels, to improve the look of the building. documents passed to the bbc reveal that zinc panels were originally proposed for grenfell. in 2012, the architects' designs show this clearly. residents were told it would be zinc. but there was pressure from the council on contractors to reduce costs. by 2015, they had been given amendments to the original tender, and told to fit aluminium cladding instead of zinc. it is cheaper, the saving more than £293,000. so did the change make a difference to fire safety? well, this panel is similar to the ones that were eventually used. it is an aluminium sandwich with a plastic filling, which is not fire—resistant. the original zinc panels were marketed as capable of being able to resist fire. both panels have the same safety rating under european tests. but one expert has told us there are circumstances where the cheaper material would have burned faster. however, even the fact that there was pressure to cut costs has infuriated those affected by the fire. those affected, and the wider community, are utterly sick of this lack of value ascribed to human beings, who pay their council tax, who pay these people's wages. meanwhile, cladding from 149 tower blocks has now failed government tests. the whole process has been criticised as pointless, because only the cladding is being tested, not, for example, installation, which also burns. pointless ? no, says the testing body. it is very critical at the beginning to do these screening tests, just to see whether there is a risk or not. whether buildings have this flammable cladding or not, well, many do. so now the question is, what do we do about it? and are there other risks that might happen as a consequence or are there other things we need to consider? resignations, a crisis in social housing, a police investigation, a public inquiry, unimaginable loss of life. grenfell tower casts a long shadow. tom symonds, bbc news. let's take a look at some of the other stories making the news: india is introducing sweeping tax reforms described as the biggest since independence, 70 years ago. they will streamline and standardise existing tax rules on goods and services. supporters say the move will create a unified single indian market and help to tackle corruption. 0pponents say many small businesses will struggle to cope with the new rules. around 60 migrants are feared drowned after their boat sank off the coast of libya. around 80 survivors were brought to the italian port of brindisi, where they told aid workers about the disaster. on wednesday a senior eu official said the scale of migration across the mediterranean is untenable, with around 10,000 people reported to have attempted the journey in the past few days. football stars and celebrities have been arriving in the argentine city of rosario for the wedding of its most famous son, the barcelona player lionel messi. he is marrying his childhood sweetheart, antonella roccuzzo, with whom he has two children. hundreds of thousands of people are expected to gather in the canadian capital, 0ttawa, on saturday to celebrate the country's150th anniversary. it is a nation that thrives on diversity, and which welcomes tens of thousands of refugees every yea r. but not everyone is celebrating the country's milestone, as our chief correspondent gavin hewitt reports. the start of a long weekend party — canada has begun celebrating its 150th birthday. cheering. millions of people expected to salute a young country, that unashamedly roots its identity in multiculturalism. canada to me means home, obviously, but it means diversity. we're very accepting of everyone here. diversity, different views, different minds, everything. why do all these celebrations matter? canada finds itself in the spotlight, astride one of the great faultlines of the moment. its prime minister, justin trudeau, has become a standard bearer for liberalism, in stark contrast to his neighbour to the south, donald trump. justin trudeau made a point of going to the airport with warm clothing, to welcome syrian refugees. a school gate in toronto. these parents pick up their children. not so long ago, they were fleeing homs, in syria. gaghader is at college, and hamzeg is already a taxi driver. canada wants them to feel canadian as soon as possible. somebody asked me, you like canada? i tell him canada is the best. canada's the best for me. my neighbours, the street, anywhere, they ask us where we are from. "0h, welcome, welcome!" and they help — what do you need, if we want help. but canada cannot escape the scars of its past. these are the lands of the iroquois, building their traditional long houses. some indigenous groups, native canadians, are boycotting the birthday celebrations. for many, the past 150 years have seen lands taken and promises broken. we were here — we look back further than 150 years. because we have been here for thousands of years. and you think canadians are celebrating, well, not everybody who lives in this country is celebrating 150 years of canada. the first nations people aren't. and then there is the british connection. today, prince charles was in the small town of wellington, beside lake ontario. one day, if things remain as they are, he will be canadian head of state. many in the crowd here want to retain their british ties. but elsewhere, some are less sure. at this anniversary, canadians are celebrating their history but these are uncertain times. they seem on a different path to their friend and neighbour to the south, the united states. it may prompt canada to be assertive in promoting its own identity. gavin hewitt, bbc news, canada. going back to our top story, the chinese and hong kong flags have in the last hour being raised to mark 20 years of chinese rule in the former british territory and within the next hour president xi jinping will inaugurate the new leader, carrie lam. protesters are planning to march in a rally to demand democracy. mainland officials have repeated the government's view that a treaty which governed the handover no longer has any practical significance. this is bbc news. well, saturday does not look bad at all across most of the uk. we are in for some sunshine and some warm weather. there is a little bit of rainfall on the way in the north—west, but it should not be too heavy. in the short term, actually a fair bit of cloud out there, and some light rain. damp weather across east anglia in the south—east overnight. many northern and north—western areas actually a lot clearer, so this is where we will have fresh weather early in the morning. in fact, in parts of northern ireland, maybe even in ruralareas, a touch of grass frost. temperatures in the towns and cities will be 10—14 degrees there in london. looking at the weather across northern areas first of all. this is first thing in the morning across scotland. looking absolutely fine, and the sun should be out. the clouds are increasing in the western isles and we have some light rain heading to stornoway. that will push into scotland and northern ireland later on. dry in belfast. notice that, maybe apart from the western fringes of wales, here in cornwall, there is a fair bit cloud around but it will be mostly thin cloud and through the morning into the afternoon, those clouds will be breaking up and we really are in for a decent day. see the sunshine there developing as that shade melts away. but at the same time we've also got a weather front getting into scotland and northern ireland so around the middle of the afternoon i think there will be spots of rain in belfast, possibly glasgow too. coolest around 15—17 degrees but where the sun comes out for any lengthy period of time across england it should reach 20 degrees, maybe even 24 in london. how are we doing compared to the rest of europe? well, temperatures are similar across the heart of europe but incredibly hot across the south—east of europe. athens, for example, 43 degrees. so that is europe. back to the uk, this is saturday night. the damp weather in the north—west that i spoke about will be moving southwards during the course of the early hours of sunday. so that means that, early on sunday morning, there could be some damp weather across east anglia, the south—east, but it should clear out of the way, and then basically we're left over with a very decent sunday once again, with some sunny spells. a little fresher. low 20s in london, 16 in glasgow but also some showers in the forecast there too for northern scotland. and then sunday into monday, weather fronts are moving in, so there is a little rain in the forecast for early in the week. that is the weekend. let's look at the weekend summary. does not look bad at all. a lot of dry weather, there will be some sunny spells, and it will feel pleasantly warm. this is bbc news. the headlines: celebrations are beginning in hong kong to mark two decades since the territory's handover to china. hong kong's newly appointed chief executive carrie lam is set to be sworn in by china's president xijinping shortly. she will be the first woman to hold hong kong's top post. president trump says years of strategic patience with north korea have failed and are now over. with south korea's president moonjae—in at the white house, he said the menace of north korea should be met with a determined response. the iraqi army says it will announce the total recapture of mosul from the so—called islamic state group within the next few days. but fighting remains fierce, and the situation for civilians still trapped in the old city deteriorates further, in the searing summer heat. now on bbc news, it's time for click.