Ben,
This is utterly appalling. You have my full support as you know.. but it does no harm to put it on here either.
I'm clutching at straws at the moment but what about the Equal Opportunities Commission... and the European Court of Human Rights... (the latter is probably a bit extreme).
Many years ago the police used to have a height restriction. In later years it was considered to be discriminatory to smaller people and as such the height rule was abolished.
I can see no reason why this should not be applied in the reverse. You ARE being discriminated against and their handling of your case shows total incompetence. How tall were you when you went for the interviews and selection.. ? I would figure probably about what you are now.. in which case they knew then.. so why does it take until now for them to start making excuses.
Good luck.. and IF this is what you really set your heart on doing... don't give up. Stand up and fight for it