On Wednesday, 17 July 2013 21:31:14 UTC+1, wrote:

Thunder heard at Guildford at 1915~1925 BST. Large Cu with some glaciation to north & N.W. Heard about 5~6 rumbles which were barely audible above the traffic. 5th thunder day in 2013 and first event with more than one rumble since Christmas day 2012, which was 2. Still awaiting the big-one. No heat-storm like today's Bracknell storm, in Guildford since 5th August 2004. Wish we (Guildford) could get an event like 24th May 1989 again - now that would be exciting.

That storm had a huge anvil which spread eastwards and curtailed the rise in temperature. Places in Kent got over 30°C but here in east Surrey the max was 29.2°C. My thermograph trace shows a sharp fall at 1230Z and a reasonable extrapolation would have just topped the 30 mark. No thunder heard here but at least it was my hottest May day.
The storms today showed no trace here. Neither were they mentioned by Stav Danaos at 0030 on Radio 4 despite that fact that they must have produced (almost uniqely) some rain over England let alone the thunder and lightning. This is supposed to be a "Weather report and forecast". I hate these people - they are such crap.

Tudor Hughes, Warlingham, Surrey.