When Is The Twilight Saga: New Moon Premiere In London? What Date? I Need To Book Flights & A Hotel. HELP ME!?

Me, My Mum And Friend Are Deffinatly Going To The Premiere. The Problem Is We Dont Knw The Date Yet. Were Flying To London From Belfast And We Need To Book Flights And Book A Hotel Before They Get Expensive. PLEASE ANYONE Who Knows ANYTHING Let Me Know Thanks Ox