"Philip Eden" philipATweatherHYPHENukDOTcom wrote :

0920z W F1-2 70m FG OBSC 03.5/03.5 1032.1
RMK: Drizzle Thu eve, then drizzle and fog overnight.
Now quite bright, though the position of the sun not
yet visible, suggesting there's not much above. I think
this is the thickest fog I've seen since I moved here
nearly three years ago.

1320z NW F3 18km 2Cu022 6Ci250 07.3/02.9 1032.3
RMK: Fog cleared very rapidly between 1000 and 1010
and it has been mostly sunny since then

Philip Eden
Whipsnade 214m