I was on 25k in a dev role with no degree or previous experience near London 10 years ago, and it was hard enough trying to get an increase then. Whenever people say they're going into computer science to earn decent money, I do warn them that the market absolutely sucks now. I have so many friends that are regularly made redundant and will go for hundreds of interviews but not get offered roles even when they're senior Devs or have been in management.