There was continuous CB activity here in West Berks for about 4 hours this morning - quite violent stuff for this time of the year in the UK.
I also experienced these very long rumbles of thunder, which seemed to rumble near then what sounds like further away. However, the amount of lightning (ie, closeness together timewise of flashes) would suggest there were multiple embedded cells and the thunder was from multiple strikes.
A friend approx 1 mile away had their house nigh on destroyed by a strike back in May, which makes one a little wary when it's flashing and crashing away like it was this morning
