Recommendations for buying Book 7 in London

[Christina Nihill]

Can any one help?

I'd like to buy Deathly Hallows in London at the earliest possible 
opportunity and I'm too late to reserve a copy at Sectus. Does anyone 
have any recommendations of shops that will be open at midnight and 
will attract a good crowd, or parties that are taking place? I'm in the 
NE suburbs, but will travel to central London if that looks to be more 
fun.  

thanks

Chris