Getting to and from the venue is down to you - but here are some pointers:

 If you're flying into London Stansted is probably your best airport.
Otherwise London City Airport is good too but flights to there are often expensive.
Heathrow is on the other side of the City of London where we'll mostly be.
 
Getting to London Town Getting round London Getting to Olde Salt Quay
The Venues by Air Can offer / Need lift Maps and Postcodes