Airport Transfers London Stansted - London
Terravision A51 Liverpool Street
This is a shuttle service from the airport to London Liverpool Street. There are some buses that go to Victoria Station, so just check the timetable to see which ones.
Remember that if you are going to Finsbury Square and you want to buy your ticket online, bookings must be made 48 hrs. in advance. If you are going to Bromley-by-Bow, tickets must be booked online and at least 48 hrs. in advance.