London and large parts of southern England are heading into what could become the first major heatwave of 2026, with temperatures forecast to climb as high as 29C across the Bank Holiday weekend.
After days of chilly winds, heavy rain and thunderstorms, forecasters say the weather is about to flip dramatically. The warm spell is expected to begin on Friday and continue through Monday, bringing sunshine, dry conditions and some of the hottest temperatures of the year so far.
