Storm risk?

Tree at Anglesey Abbey 

We booked on-line to visit a local National Trust property this morning as the weather forecast was good. In the last 6 hours it has changed twice, at one point predicting thunderstorms! Honestly they have no idea. Now it looks quite good. All my radio gear is disconnected, just in case!

UPDATE 1112z: In the end it was dry and hot. If you want to know the weather look out of the window!