"Philip Eden" philipATweatherHYPHENukDOTcom wrote :

0850z NW F1 80m/4000m PRFG SKC 06.4/05.1 1018.1
RMK: A bizarre morning. The extensive fog in the Vale of Aylesbury,
stirred up by strong sunshine, has been drifting over the top of
the Downs under the influence of a barely perceptible NWly flow
(presumably decoupled), but the fog has only reached the adjacent
field to the W of here where the vis is 80m or less tho' the sky is
still blue. Vis at least 4km to the E.

0950z Fog, vis 100m, sky obscured althoug sun's disc ocsnly visible

Philip Eden
Whipsnade 214m