The Met Office has reduced its heatwave warning levels for much of England. The North West, West Midlands and South West were at level three - when health services should take action to protect elderly, ill and very young people. But these have been changed to level two - "alert and readiness" - matching all other areas except the North East, which is at the lowest warning level. Meanwhile, Scotland, Wales and Northern Ireland had their hottest day of the year on Friday.