This is bbc news. Im martine croxall. The headlines. The uk experiences its hottest day for a july ever. The nhs warns of the risk of heatstroke, and councils are stepping up home visits to the elderly. Train passengers are told to stay at home, as the extreme temperatures cause chaos on the rail network, with problems on overhead lines. Were not the only ones. Extreme heat has gripped much of western europe, with paris setting a new record of 42. 4 celsius. In other news, on his first full day as prime minister, borisjohnson predicts a golden age for britain after brexit, and welcomes in his new cabinet. 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 31st october. Nissan cuts its workforce by 12,500 worldwide, after reporting a 98 drop in profits. In a moment, it will be time for sportsday. But firs