Surface winds are offshore ahead of the precip. Temps looks just favourable for most IMO. The lightest precip may fall as rain. But a snow event looks most likely away from coastal fringes.
Radar beginning to pick up now in Norfolk.
Think things looks quite positive for a fall of snow for London going on last few frames. Say in 2hrs time? Maybe
Something developing east of Crawley headed for London, perhaps a snow shower possible?
-- Edit, only just realised temperature still isn't low enough! Just drizzle!