A lively start to the week with intense thundery rain through the south-east already - and further downpours in places this afternoon.
A few scattered, light showers will drift through Northern Ireland, the West Country and Wales.
Elsewhere a fine, bright day with sunshine. Looking good in Glasgow for the Commonwealth Games.
Highs of 22C in the north and 25C in the south, but muggy with the thundery air.
Rather than a winter phenomenon, hail is surprisingly common during the most intense summer thunderstorms.
Lightning and hail storms, described by locals as like walking through a 'zombie apocalypse,' causes travel chaos in Brighton.