On 2014-03-09 18:46:21 +0000, Lawrence Jenkins said:

Lovely in Sydenham SE London this afternoon and I warned all the local
Pound Shops to keep their fine selection of plastic home ware indoors,
lest they melt. I have to say though it did get above 70f in my back
garden but my thermometer was quite close to the garden brazier I got
going early evening.


I don't believe anything from Gravesend.

20C they are supposed to have reached, and that is with an airmass
dewpoint of 4 or 5.

They should be subjected to a correction of -10% on their max's, or ignored.