http://www.isleofwightweather.co.uk/live_storm_data.htm
If you want to see the storms and lightning strikes across Britain right now this is almost certainly the best place to see it. Live data is overlaid on a decent quality picture of the British Isles.
Somehow, even though I’m in South Central England, I’ve managed to completely avoid anything more than a few rumbles and a brief shower. Almost certainly living in the shadow of the Isle of Wight has something to do with it.