The home of the BIG GAME LAN Party is: 

Wildern School, Wildern Ln, Hedge End, Southampton, Hampshire SO30 4EJ

the BIG GAME is located in the main school assembly hall directly opposite the gym complex, easily accessible from the main carpark with loading/unloading areas right in front of the hall and safe secure parking in the school carpark (which is locked in the early hours of the morning).