Currently around 29 about 1 mile south of the weather station 

None of the nearby official stations have updated. Fleetlands was 27C at 1pm and Thorney same at 2pm

Traditionally, farmers begin harvesting their crops towards the end of August and in early September. [BBC Countryfile]

https://www.countryfile.com/how-to/food-recipes/british-harvest-how-long-does-the-season-last-when-is-harvest-day-plus-history-and-traditions 

In some cool and wet years (remember those?) I've seen harvest (in East Anglia) as late as early September

Started about a week ago here  farmers want about 15 percent moisture not much less because of weight per Ton ie heavier than with less moisture.

So this year can go early.

They get paid per Ton think it’s about £150 but has been as low as £60.

Some hold for better price but risky storage costs etc.

Other thing of importance around here is that water tankers are pulled into the field that is currently being harvested because of risk of machinery getting hot and starting a fire in open cereal fields a good first line defence.

29.5c Writtle 

More widespread 29s than yesterday so I think we'll make it again just about 

Might still scrape 31C

I heard that on Farming Today, but the farmer who I saw combining obviously hadn't heard!

A fair number of crop fires around here this year.

Five stations within 0.5C of 30 but no official 30s yet as far as I can see.

Yes , London has had a late burst. 

Kew 29.8c

Teddington 29.7c

HEATHROW 29.6c.

Not sure if the Netweather feed has minute-by-minute data for all stations, but it has't picked up any 30s yet. Might have to rely on a manual station (and most of those in the southeast don't provide data on WOW any more)

Temp is still climbing here, 28.6 is the highest of the day.

And there it is, good old Heathrow with 30.0C at 1620Z.

Or perhaps not. Weatherobs said 30 but Ogimet says the 1620 reading is 29.0.

30.2c at Kew, Met Office just tweeted. 10 in a row

30.4 Heathrow, they're a bit behind. Glad we made it, anyway!

Only 26.8C / 27C here today. It's unusual to see such a big difference with Heathrow.

Looks like Thorney Island and Teddington got over 30c as well.

Looking at Roost Weather I can see a 13 day run from the 16th to the 28th, but not 14 days.

Knew we’d turn you into a heat hound. Next thing is it’ll snow where you are on Xmas day and you’ll be absolutely apoplectic about it

Hopefully a late entry by a manual station later to up the total. We can’t beat the big boys by crawling along with 30Cs, we need some 34s and 35s.