Basic is £29k, however there are decent working day off / nightstop / fda payments which take you nearer £35k+. Each year your basic goes up as well.
Side note...
Personally I would not go to L3 - whilst Flybe (and other airlines) like integrated schools as its all under one roof they charge around 60k more than they should, and it isn't the be all and end all. Despite being expensive in the past, the genuine support and good will that came your way isn't as strong unless you are coughing up excess cash since L3 arrived on the scene. Lengthy delays (what's the point in doing integrated when you will be delayed?), some questionable attitudes towards cadets and poor organisation all contribute to my opinion - I am not alone in this boat who have experienced their nonsense.
All the best! 👍