Airbrake,
Don't know if it helps you but here should be some average figures for BA.
Year 1 DEP = £48500 (it's actually not a round figure but it's £48000 and a bit)
Average allowance is £12000 yearly
Yearly increase in salary (i.e. year 1 to year 2) is around £2500.
Don't work for BA but figures are from a friend who works for them.