Well- Chilton reached 3.2 today and Camborne 3.6. Can't quite believe it myself. This equates, in solar angle, to the very end of September/ start of October. 3.2 of course is attainable at that time of year- but the thing is, this is the side of the winter solstice when equivalent solar elevations do not lead to equivalent UV indices, due to eg O3 levels. So- this one should be marked up.
Bertie, Itchen Valley.
'We'll never see 40 celsius in this country'.