Thats some storm to the Southwest of London. Must be some major flooding about to 

From what I am hearing there has been severe flooding in parts of Newbury, also in Maidenhead and other surrounding areas. Trains are severely disrupted this morning.

In Chineham the A33 under the railway bridge is closed due to flooding (a notorious hotspot). A car is floating in the water.

Last night's storm was the nearest I've seen to a proper 'continental' style one in the UK. Today so far I've recorded 34.6mm of rain. 

Struggling with the 2 mm of rain since last night.  If anything, it's actually brightening up again.

Although most of the rain are still to my west and looks heavy in places, but even so, I'm started to doubt my own forecast of heavy persistent thundery rain for my area for the rest of today. Still early in the day to write it off, though.

Thundery rain never ever existed in here, they should use either general rain, shower or thunderstorm, never use this wording in N America. Latest radar is just normal Autumnal rainfall today.

A real let down here.

Light to mod showery rain at times.

Struggling to get even 1 mm rain here. Just heavy cloud and odd spot of light rain; is now actually brightening up. Although there's thundery rain much further to the W, I would not be surprised if the rain areas either split-up and miss us or never actually arrives here later today.

There has been no thunder activity here since 20th July. This is VERY unusual, particularly for August!

My turn to experience some real rain now as 13 mm has fallen in the past hour here at Folkestone and is still raining, although the real hard stuff appears to be over the sea. Probably drawing heat from the warm Strait of Dover.

Edit: 20.3 mm now, but the rain is easing off.

Quite impressive. Official figure for 6pm - 6am in Farnborough was 39mm but I am sure some places nearby had considerably more.

Perhaps I wasn't going mad then!  My rain gauge has broken so couldn't measure, but a water bucket outside (away from anything that could run into it, had a good 5-6 inches of water in it - all of which would have come from last night's rain in Bovingdon (10 or so miles up the road)... I've never known anything so intense last for so long.  If it hadn't been for one road, the village would have been entirely cut off this morning.  Waist deep flooding on the village centre causing damage to various properties, which is all the more impressive considering Bovingdon is higher than the surrounding area at 500ft or so!

And here's the evidence!

I checked my gauge as I thought it was faulty but it seems to be working fine, since midnight it recorded 106.2mm. No wonder there was a landslip in Watford that blocked the train track. I haven't been out to check any flooding around the area but in 33 years that I have been recording the weather this is the most rain in 24 hours I have experienced.