I assume that is the scientific explaination for the thin high cloud and
strong breeze bringing cooler conditions to the S.E.

Dave

The high cloud has been there all day, and I thought it was pretty thick,
some of the thickest Ci/Cs I have seen for a long time. The Sc didn't arrive
until later, but I didn't detect any lenticularity, maybe for not looking hard
enough and it looked pretty bog-standard stuff and made me think the fine spell
has gone a bit sour, at least here in the SE.
The wind is forecast to veer a bit in the next day or two and this could
make all the difference between relatively cool cloudy conditions and some
rather exceptional warmth.

Tudor Hughes, Warlingham, NE Surrey, 556 ft AMSL.