This isnt going to be happening anytime soon. As far as I am aware it is still in the trial stages with women!
Women that have uterus transplants have to take anti rejection medication and some of them women have gone on to have successful pregnancies already, so anti rejection medications must be safe for pregnant women.
These women aren't allowed a natural birth though it has to be a Cesarean section as they don't get the normal contraction pain and the uterus wouldn't be strong enough to withstand the full extent of labour and childbirth like it would in the original woman's body.
There probably is no reason why they couldn't place the uterus in a male now, they wouldn't have to worry about the narrow hips for childbirth as it would be a c section.
So if they could for example safely pump a man's body full of a ridiculous amount of hormone therapy that would be safe to sustain, his body and the babies body growing inside of him. With the potential for all crazy and life threatening/ dangerous pregnancy side affects many women can suffer from then I'm sure it will happen.
But before any of that can go a head this major surgery has to be proven safe and successful with alot of animals.
That means male animals sustaining a successful pregnancy.
We are a long way off this even happening yet, with human trails still going on with women at the moment.
No one can force you to give up organs you don't want to. And even if you are an organ donor your next of kin can still refuse for them to harvest your organs. This isn't going to be the new next in thing.
Women can't even get sterilised if they don't want more kids, so the NHS won't be paying for this at the stupid price it would cost!
Organ donation is for life saving not for men that want to experience pregnancy.
If this kicks off it won't be in the UK it will be some expensive private precedure abroad, you would have to be rich or crowfunding to afford it!