In article ,
Col writes:
At first glance, I wouldn't have thought that would have been
particularly mild, no.

Agreed. All that red and orange doesn't mean a lot in the winter months
when high pressure prevails, as there's generally an inversion. Also a
couple of days earlier a northerly had brought in some cold air:

http://www.wetterzentrale.de/pics/ar...0119651103.gif

With no strong winds thereafter, that air would have lingered near the
surface.

In the SE the wind (if any) would have
been from the NE. Depends on the origin of the air of course,
about average temps, perhaps?

Looks to me as if winds would have been light, and if the sky was clear
it might have led to frost and/or fog. The figure for 5th November, 1965
from the daily mean CET series is 5.1C, which for early November is on
the cold side.

By the 8th it would have been very mild, though:

http://www.wetterzentrale.de/pics/ar...0119651108.gif

Maybe Lawrence's Guy Fawkes celebrations were held several days after
the day itself, as often happens when the 5th falls in midweek, and
that's why he recalls it as having been very mild. (I haven't checked
what day of the week the 5th was in 1965.)
--
John Hall
"The power of accurate observation is commonly called cynicism
by those who have not got it."
George Bernard Shaw