London game shops and events in December?

The memsahib and I will be in London December 4-10.  While she's looting
Harrod's I will be shopping for wargame historical figures and books.  Can you
please advise me about cool shops and gaming events with vendors happening in
that period, in or within day-trip range of London?  My Wargamers mags always
arrive too late, after the advertised events have already taken place...

Thank you, 
Dave Gilson
[EMAIL PROTECTED]