Originally Posted by Mr Toad

Get there early - it might take some time to find a slot for your bike - there is a bike bay on Dean Street, but it's usually pretty busy. There are also bike bays on the corners of Soho Square. Don't be tempted to park anywhere or you will def get a ticket
Can't you get changed at the venue - a quick trip to the loo for a Superman impression, and grovel nicely to the receptionist for somewhere to leave your gear - done this many times