Related, but not an answer...

I would be interested to know if any site in Wales beat my 27.4°C yesterday.
If only my site were official, the Betws-Y-Coed temperature would now be
irrelevant!

Adrian
Pontrhydygroes, 12 miles ESE Aberystwyth, 280m/860ft asl
http://users.aber.ac.uk/ais/weather/