Simply, the earlier the better. Now, we’re not saying you need to wake up groggily on the 26th of December and start drafting a secret Santa employee map (unless you really want to). But the truth is the best London Christmas party venues will start to take bookings well before the festive season starts in earnest: we recommend starting your search towards the end of summer, no matter how wrong it feels, and that way you’ll ensure you’re on the venue-booking good list.