Iv recently just sent in my application to the police (dunno how it will go well being diabetic) but it does say they they give full consideration reasonable adjustments when it comes to the medical side of things so don't see when you should be any different to a recruit
That they use the same term, "reasonable adjustments" doesn't mean they are the same adjustments as any other employer might make. The reasonableness of any adjustment has to really be within the bounds of the individual still fulfilling their role, within the employment unit.
Whilst
@richie69 says he works for the police force, I can't see where he says he is a police officer. As I understand it, police forces employ lost of civilians within their organisations, doing all sorts from desk driver up through the activity levels.
@richie69 - As I say, I don't know what you do or for that matter much about a police force's obligations to make whatever quantum of adjustment, but as a manager, that you can be a "regular runner" (as stated on your profile), you clearly can manage activity and your bloods, otherwise I assume you wouldn't do it. Have you perhaps got yourself into a bit of a comfort zone on this? Change is challenging and the natural thing for most people is to resist it, and maybe after 12 years of adjustments you could give it a go? If it really doesn't work for you, then might be the time to work with HR as you might have demonstrated how and why it doesn't work for you.
For the avoidance of doubt, I'm not suggesting you deliberately make yourself ill, but maybe a trial period on shifts would be fair all round?
I'll get my tin hat and flack jacket.