Doobs, you should contact the Royal British Legion now. Ask for advice. There is nothing available until after you retire but the sooner you claim after that point the better as the injury is clearly attributable.
At the least you may get a lump sum. Later, if there is a further attributable deterioration it may be reassessed and you get a pension.
Beware though, once a pension is in issuance if you appeal later and they assess an improvement then you could have it reduced or stopped.