Hi Wheelbarrow
Perhaps a reason why the company uses the 125 rather than valuable time on the 75/76 is because sim slots aren't that abundant. The last bunch of Trainees had to go to Brunei in order to do and complete all their sim work because of a lack of capacity on the 75/76 sims.
Also the 125 is configured to 75 speeds and power settings, unlike the BAC 1-11.
LGW, MAN,LTN,LHR sims are currently used by Britannia for routine checks which reinforce my opinion on how tight the situation is.
I agree though, If you hire type rated guys, you should try your best to check them on a relevant type.
Cheers