Not sure if this is useful, but this is from some Thomas Cook literature I got early in the year:
As a Cadet Entry Pilot you will enter the airline as a Cadet Entry First Officer (CEFO). Promotion to Cadet Entry Senior First Officer (CESFO) occurs after three years employed service or achieving 1500 hours TT. In practice, therefore, it normally occurs before those 3 years are completed.
In addition to salary, the Cadet Entry Pilot’s bond will be repaid at the rate of £12,000 per year for 7 years. At the end of the bond period, the Cadet Entry Pilot will transfer to the Direct Entry terms and conditions. Depending on how quickly you are promoted from CEFO to CESFO this will make your year 8 basic pay £41,362 to £43,033 or, if you have achieved a command by then, the appropriate Direct Entry Pilot captain’s salary.
Where the relevant year-on-year salaries for cadets (after deduction of the bond payment) are
Cadet Entry First Officer (CEFO)
Year 1 £17,434
Year 2 £19,494
Year 3 £23,273
Cadet Entry Senior First Officer (CESFO)
Year 1 £26,976
Year 2 £26,976
Year 3 £27,755
Year 4 £28,550
Year 5 £29,362
Year 6 £30,189
I believe Easyjet publish their wage-projections on their website. Not sure about the other airlines involved.