A few days later
on 22 November, snow fell heavily in the afternoon for about 2 hours,
producing a good snowcover - a rare event for November in this part of
England

At a guess we must be currently in a spell of about two weeks where the
temperature has never, in any year, exceeded 20C, nor has there been
serious snow (enough to produce a good cover) in southern England. From
earlier comments on the warm spell this would appear to last from about
Bonfire Night through to around November 20th. The most equable time of
the year, so it can only be uphill from now on.....

Contrast with spring when both can occur, sometimes within the same
week....

Nick