"Philip Eden" philipATweatherHYPHENukDOTcom wrote :

0950z ESE F2 2400m HZ SKC -00.2/-01.7 1036.2
RMK: Copious hoar/rime ... probably was foggy for
a time overnight given the extent of rime.

1150z ENE F2-3 500m FG 6St000 00.9/00.6 1034.9
RMK: Fog formed rapidly around 1030z, with vis
dropping to 125-150m for a time. Hoar now gone,
but ground still frozen

Philip Eden
Whipsnade (214m)