On Aug 24, 8:24*am, Nick wrote:
..

Incidentally why the extremely low temperatures? (I think below 15C in
August, being equivalent to sub-zero in January, can warrant that
label) Typical temperatures for a wet August day IMX are in the range
17-19C (for southern England), and the temperatures observed in
Hereford, etc, suggest this wasn't a particularly cool airmass.

Nick

Tha max here was 15.1°C which places it in the bottom 1.5%
of all August maxes since 1983. The equivalent max for January is
-2.7°C. The standard deviations of maxes in both months is similar
but they show opposite skewness so that the 15.1° is 6.0 degC below
the August median whereas the -2.7° is 9.4 degC below that for
January.
It did not feel all that cold, despite continuous slight
drizzle. There was no wind to speak of and the humidity was high.

Tudor Hughes, Warlingham, NE Surrey, 556 ft, 169 m.