It depends on the severity of the injury. Once you put in the claim SPVA War Pensions Dept will apply for your documents (it took them 4 months to get mine even though the AFCS dept already had a copy). Once they receive your documents they will write to your GP and all evidence will be assessed. It will take some time so I'd advise you to talk to SPVA Welfare. RBL are very informative to, check both websites:
From my experience (1995) hearing loss,they will push the lump sum and dodge the pension option.
Also check and see if the settlement is in full and final settlement as a medical issue can trigger other underlying medical problems.
I have been able to do my job and will continue to do so untill I leave in December(i have never been unable to do anything that was asked of me).it has only became really bad in the past year,and it was likely that I would be pap10 if I wasn't made redundant.
Broke my ankle in the seventies due to bad landing after a jump. I ended up pensioned out in the eighties because of arthritis.My pension has gone up over the years from 30 to 70%. I've had a lot of surgery over the last ten years, none of it very successful. The surgeon i see is now suggesting amputation below the knee. I bet if i agree to this my pension percentage will drop. I don't think that when pension is being assessed they realise how much yor chances of employment are reduced.