What can you do with a cadet pay in london ?
Live in cardboard boxes
If you have flight school debts and are coming at a reduced salary, consider bases further up North (if you're going to be UK). You'll have a much better lifestyle. Near LGW, STN or LTN you won't basically be able to live on your own in a half-decent one bedroom flat. Honestly, unless you're coming for Paris you're in for shoc in terms of what you'll get for your money.
P