Seems as if you're far more concerned about "diversity and equality issues" than you arte about being a Police Officer.
"I certainly am not one to start making a big fuss over something so ridiculous." You could have fooled me.
"and this random one bloke jobs worth" I take it that you're referring to a senior Officer?
You say you're 24, have been in the job six years, you've been on the sick for at least one year of that, probably more I suspect, and you haven't said one positive thing about being in the Police, it's all negative because they allegedly won't let you wear a certain type of trousers?
Now, I know probably a lot better than most on here how Police Officers like a good whinge now and again, but I've never ever heard such a load of twaddle.
If you really are a genuine Police Officer, this matter would be firmly in the hands of the Federation and your own doctor, with certain input from a Police doctor as well.
You cannot be deemed to be fully fit for operational duties from what you've described, and I doubt very much if you've been wrestling with drunken yobs, for example, in the recent past? You need to be capable of at least coping with the physicalities of the job.
Plus, you rattle on about getting a desk job, with 6 years in the job? I don't think so, they'd find a way to get rid of you, believe me.
All over a pair of trousers! No wonder I thought this was a wind up! As a Police Officer, you either get on with it without the self pity, or you get out.