I agree with the statements saying yes to promotion but no to further service.
The way I understand it is that any offer of further service requires a medical examination to confirm medical category. This then puts the offer on hold if the medical category is not good enough - although I don't understand what the differrent codes mean!
I'm A4 G1 Z1 which I think means send me anywhere you like sir/ ma'am 'cos I'm actually earning my x factor AND I'll do your fitness test every year for no extra financial reward or penalty to those that can't / won't / don't.