This new team assembled here and reflecting, i think, the depth and breadth of talent in our extraordinary party. He then set off for the commons, where mrjohnson told mps, while he wants to leave the eu with a deal, there must be preparations for a no deal brexit. Today is the first day of a new approach which will end with our exit from the eu on the 31st of october. And in cricket, nightwatchmanjack leach hits a spectacular 92 as england open up a slender lead against ireland in the four day test at lords. The uk has seen the second hottest day on record, with temperatures reaching 38. 1 celsius in cambridgeshire. Its also the hottest day of the year so far. While families are enjoying the school holidays, the heatwave is a chance to bask in the tropical temperatures, for others, the extreme weather could mean disruption or a danger to health. Public Health England has issued a heat health warning. Lets speak to our weather presenter, chris fawkes, about whats causing this record breaking heatwave. It is hot, terribly hot. But we havent quite hit that magic figure, havent quite hit that magic figure, have we, to reach the all time record . Not yet. We had a lump of cloud that came across from france. As far as temperatures go, it is the hottest july as far as temperatures go, it is the hottestjuly day on record. The previous record was 36. 7 at heathrow backin previous record was 36. 7 at heathrow back in 2015, and we have annihilated that. The top temperature so far today has been reported 838. 1 celsius. Kew gardens have come in at 37. 7. As it stands right now, we are four tenths away from equalling the record that was set back in august 2003, that still stands in kent. However i remember forecasting that day, and it took a few days for this data to come in from five version, so it could well be that we get more data, notjust over the next few hours, but it might even take a day or so before we know the true highest maximum temperature we have seen today, but it has come down to a matter of tenths of a degree, it has been a very close run thing. The hot weathers led to a reduced or altered service on much of the uks Train Network today, with some rail firms advising passengers not to travel. Severe speed restrictions have been imposed because of measures to prevent rails buckling in the heat. 0ur transport correspondent, tom burridge, has more. Travelling today is a sticky and thirsty affair. I have got a little hand fan and lots of water. You get off the train and onto the platform, its like going into a hot house. If the air on the platform feels hot, the steel on the tracks will be potentially 20 degrees hotter. Just as a coin left in the sunshine heats up, the track does the same and as the steel gets hotter it expands and can buckle when a train goes over. This is what a buckled rail line looks like. This train derailed in california because of a buckled line. So now speed restrictions are in place across much of our railways. A blanket 60 mph limit for all services travelling in the southern half of england. Trains in between london and the north of england, scotland and wales will also be affected. 0ur railway is geared up to run under the norms of uk temperatures, and therefore when we go outside of that which is happening today we have to put in special measures to accommodate the difference in circumstances. With only seven in ten services running, the commute this evening is likely to be a slow and crowded affairfor many. What we are saying to people is only travel if you need to. If you need to make that journey, consider another mode of transport other than the train but, if you are travelling on the train, bring water with you, check with the operator you will be travelling on that there isnt an disruption and listen to the announcement. Tracks reinforced with concrete slabs are not the norm in britain because it is four times as expensive. The majority of the network is not built to withstand the record temperatures expected today and so there is a risk that lines could buckle in the heat. Tom burridge, bbc news. 0ur correspondent, andy moore, is at london euston station. My my word, it is rush hour, how awful could it be where you are . A lot of problems here at euston another major london rail terminals. We were hearing about the problems on the rails beneath the trains. Most of the problems have been with the wires above the trains. We are getting lots of reports with problems of overhead wires from a few different parts of the country from peterborough, the midlands, and two incidents just outside from peterborough, the midlands, and two incidentsjust outside london. First just outside two incidentsjust outside london. Firstjust outside st pancras there was a problem with the overhead wires there on the line to luton. You might be able to see some flames in the shots, the fire brigade were in attendance without incident. We are being told that there is a wise drupal sag in the heat, and the mechanism that picks up the power from the train, otherwise get caught up from the train, otherwise get caught up in that, and the wires are brought down and cause a power failure. Another incident to tell you about is just outside used in a couple of miles north, maybe even less tha n couple of miles north, maybe even less than that, where a virgin train, again because of overhead wire problems, came to a complete standstill. Without the power, there is no air conditioning, you can imagine what it is like to be trapped for some time on a train like that, people have been contacting the bbc, saying it was like a sauna on board. We believe some of those passengers may have been taken off onto another train, but the line itself is still blocked, so certainly problems out of euston. Those of the problems with the wires, and then there are problems with the rails. 23 network rail franchises in the problems with the rails. 23 network railfranchises in the uk, 19 or 20 companies are expecting some sort of problem, and six of them were advising their passengers not to travel at all. The problem is, people have got to get home. And as weve been hearing, its notjust the uk that is sweltering in the heatwave. Temperatures in paris have hit a record 42 celsius today. Parisiens have been keeping cool by paddling in temporary pools like this one at the eiffel tower. Temperature records have also been broken in belgium, germany and the netherlands for the second day in a row as hot air pushes up from north africa. Im with our health and science correspondent, james gallagher. The wider Public Health aspects of this, james, what are they . Heat waves ca n this, james, what are they . Heat waves can be deadly for some people. There are about 2000 heat related deaths every year in england. The reason for that is your body has to fight to keep cool because your body has to grow temperature 37. 5 degrees and it can to win back down to write down our bodies are increasing the blood flow to our skin so that straining the heart, we are also sweating to cope with the heat, losing fluid and salt and changing the balance inside the body. Both of those things are increasing the strain on your body, the stresses has to go through, and those can culminate in things like heat exhaustion and heat stroke which can be fatal. Many people will talk about Global Warming and the effect of man made Climate Change. Is that a factor here . This is the challenge. It is todays weather event down to Climate Change . What we can say is that because the weather is so variable, these events will become more likely in the future, they will become more extreme, more common, they will last longer. It is difficult to pinpoint todays weather is so variable, these events will become more likely in the future, they will become more extreme, more common, they will last longer. It is difficult to pinpoint todays lead on Climate Change because weather is naturally so variable. We are comparing todays figures with 2003 so you have to zoom out, look at the big picture, how are things changing at the time . That is when we start to see that Climate Change is playing a role in extreme weather, including heatwaves becoming more frequent. So last year, 2018, joint hottest summer on record, the met office estimated that was 30 times more likely to happen because of Climate Change thanit happen because of Climate Change than it would have done otherwise, so than it would have done otherwise, so you start to see these things in the big picture but not by looking outside your window. We have a new Prime Minister and a new government, and you are suggesting that we should be expecting more days like this. Do we need is a country to be gearing up our infrastructure to deal with this . We have heard from correspondence all over the place talking about the rails buckling. We get extreme temperatures like this in australia and north america all the time, so do we need to gear up for these eventualities . On the rails, yes, but also the homes we live in are not suitable for bigger more extreme hotter temperatures either. No air conditioning, but also our houses are designed to keep heatin also our houses are designed to keep heat in because we are not spectacularly hot country so when you go to the mediterranean the design of the architecture is different to allow heat to escape more easily. But dont forget, not that long ago we were talking about the beast from the east. We have to look at their ability both extremes. We cannot suddenly go, we are spain, we can plan like spain, it will be much more subtle like that. We are britons when it comes to the weather, we never happy lets talk more on this now with alyssa gilbert, head of policy and translation at the Grantham Institute for Climate Change. Thank you forjoining us. I will ask the same question, Climate Change, is that what this is all about . Absolutely. As your previous correspondence described, it is an individual event. 0ne correspondence described, it is an individual event. One of the weather event we cannot say is happening because of Climate Change but if you look at this pattern of the time we see the increasing probability of this happening. A few days of extra hot weather here in london now is exactly what climate scientists have been predicting, and we would expect. We had this last year and were having at this year. You are expecting next . Climate scientists cannot tell us what the weather will be like each part of each year, but what we can say is that an extreme event that would have been very unusual 100 years ago will become more usual, more expected, and we can also see now that the average global temperature now is 1 degrees more than it was preindustrial times, so that means an extreme heat event is even times, so that means an extreme heat event is even more times, so that means an extreme heat event is even more extreme because we are already topping up on a 1 degrees increase. Apart from trying to cut Greenhouse Gas emissions and so to cut Greenhouse Gas emissions and so on, and there is a concerted effort around the world to do this, particularly in the west, although china and india and so on have tried to sign up to various things to deal with this, what can we practically be doing in our own homes to combat this . There are two sides to the story, one is we should make efforts to reduce our Greenhouse Gas emissions so we do not continue to contribute to this ever increasing number of extreme events like this one, so the kind of things you can do in your homes is think about the construction of your house and how you keep cool, try and use more sustainable or renewable ways of doing so, you can think about how you travel every day, maybe walk or cycle more. Perhaps you can reduce your flights if you fly, you can think about your diet as well. Some types of food contribute less to Climate Change so if you introduce a day or two in your week where you dont have meat and have a more plant based diet that reduces your impact. If you are lucky enough to have green open space in your home plant a tree, those are easy contributions to reducing your Greenhouse Gases. But dealing with the hot temperatures themselves, getting air conditioning will contribute to the thing . That is right. The rooms we live on in the uk tend to be old so they are not great in the code overheat. So rushing out to put an air conditioning will not be great in the long term. We need to think how we build our infrastructure in a way in the longer term that can cope with these extreme heat shocks and this change in temperature pattern. 0ne this change in temperature pattern. One way that its really good is to build blue and green spaces, so more spaces outdoors with pockets of parks as well as pockets of blue space, giving us leisure space, but it also calls our city down and regulate the temperature even in cold times. These small features of oui cold times. These small features of our city can make a difference to oui our city can make a difference to our comfort levels. Very interesting indeed. It is good to see you, thank you forjoining us. And well have more on this with a full Weather Forecast later in the programme. Borisjohnson has addressed the commons for the first time as the uks new Prime Minister. Promising a new approach to domestic policies, he told the house he would prefer to leave the eu with a deal. We will throw ourselves into negotiations, he said. But mrjohnson said a priority for the new government would be to prepare for a no deal scenario. Labour Leaderjeremy Corbyn told him no one trusted him. Earlier, in downing street, mrjohnson addressed his new cabinet ministers for the first time, telling them they had a momentous task ahead as he repeated his commitment for the uk to leave the eu on 31st october. 0ur political correspondent, nick eardley, reports. Good morning, everybody, and it is wonderful to see this new team assembled here today, in respect of the depth and breadth of talent in our extraordinary party. A sight to get used to, a new Prime Minister in number 10, a new plan for government, a team trying to make rhetoric a reality. We are now committed, all of us, to leaving the eu on october the 31st or earlier, no ifs, no buts. Around the cabinet table, listening to the new boss, whether this excites you or fills you with dread, things are looking very different in downing street. Borisjohnson isnt hanging around. After chairing cabinet, he was off to parliament, welcomed to the chamber by his new leader of the commons, jacob rees mogg. Triumph after triumph achieved by this government and weve only had our new Prime Minister for 24 hours. Its amazing. Prime ministerjohnson, here to tell the commons what he will do with power. 0rder, statement, the Prime Minister. More important than anything, brexit. The current deal, he says, is dead. The Withdrawal Agreement negotiated by my predecessor has been three times rejected by this house. Its terms are unacceptable to this parliament and to this country. No country that values its independence and its self respect could agree to a treaty which signed away our economic independence and Self Governance as this backstop does. The insurance policy to avoid a hard border in ireland has to go. He urged the eu to renegotiate and if not. We will have to leave the uk without an agreement under article 50. The uk is better prepared for the situation than many believe. But we are not as ready yet as we should be. In the 98 days that remain we must turbo charge our preparations to make sure that there is as little disruption as possible to our national life. I believe that that is possible with the kind of National Effort that the british people have made before. The message for those who say he cant deliver. These are the sceptics and doubters, they are. Time and again by their powers to innovate and to adapt, the british people have showed the doubters wrong. This Prime Minister isnt short of enthusiasm. We will be able to look back on this period, this extraordinary period, as the beginning of a new golden age for our united kingdom. That enthusiasm excites many in his party. Today, the eu will have listened and realised the days of supplication are over and that we are intent on a policy to leave the European Union. But he leaves others deeply worried, unconvinced he can deliver. The house will have both a sense of deja vu and of trepidation at a Prime Minister setting out rigid red lines and an artificial timetable. There is something eerily familiar about a Prime Minister marching off to europe with demands to scrap the backstop. Labour are worried about his priorities. We have a hard right cabinet staking everything on tax cuts for the few and a reckless race to the bottom brexit. The snp even think it could mean the end of the uk. I should welcome the Prime Minister to his place, the last Prime Minister of the united kingdom. There are many battles in here to come. Borisjohnson now has his own team around the cabinet table, ministers fully signed up to his brexit strategy, but he faces many of the fundamental problems theresa may had. A European Union that says it wont renegotiate, a wafer thin majority in parliament and, after sacking key ministers, potentially a number of backbenchers who could make life difficult. But in downing street and in british politics, many things are changing. With me now is our chief political correspondent, vicki young. His first statement to the house as Prime Minister, how did he do . The contrast with theresa may could not be greater just contrast with theresa may could not be greaterjust in the pure style, it was very raucous, and partly because conservative backbenchers behind him was so enth