"Philip Eden" philipATweatherHYPHENukDOTcom wrote :

0920z NNW F2-3 100m FG OBSC -00.1/-00.1 995.0
RMK: Fogged out approx 20z Fri. Has thinned a
little as I write (1015z) with some high Sc visible at
the zenith

1320z NNW F3 100m FG OBSC 01.3/01.3 994.7
RMK: Vis improved to 400m around 1015-1045z, then
thickened up again. Light levels much lower now.

Philip Eden
Whipsnade 214m