Their HammerSmith office (in London, U.K.) is very awesome. It spreads on many stories. The waiting room is impressive. On the right, you have a glass wall that lets you see into the BetFair team who is monitoring the current state of their worldwide exchange.
1,000 times bigger than the InTrade-TradeSports office (located in between Dublin and Cork, Ireland).
I visited both —-not that many people can tell you that.