OK thanks. I have seen 2 different spreadsheets based on retirement at age 65, with no allowance for pilots retiring earlier, going part time, sickness etc, i.e. the worst case scenario. The average number of pilot retirements shown is around 100 per year until 2029 when it starts to increase to around 200 for a few years and then drops to about 130, around 80% of those numbers are P1. Those spreadsheets were produced about 6 years ago.