In message , Martin Rowley
writes
... after thinking about it for much of the day ( a little moderate
spurt this AM ), 'significant' rain has arrived .. set in here 1530Z
(4.30pm), with a short burst of heavy, now (1544Z) settled back to
moderate intensity.

Martin.

First spots in Chalfont St Giles at 1605z. Not 'significant' yet.

Norman.
(delete "thisbit" twice to e-mail)
--
Norman Lynagh Weather Consultancy
Chalfont St Giles 85m a.s.l.
England