Since LM has been on the scene in the IOM the cabin crew base has been 4 full timers with the ATR42/S2000 (single cabin crew member) covering just LCY/LHR, with crew from GLA & ABZ frequently drafted in to cover leave, shortages, sickness etc - the ATR72 needs 2 CC. I know of 1 IOM based hostie who has just left so I'd estimate a base of at least 24-25 would be needed.