I didn't answer before as I was not sure if there was a difference between the pension following a medical discharge and one where there is a claim for a disability for instance for deafness.
In the first case I believe there are set pension rates etc that are set out in the AFPRB reports.
In the latter there are rates set by the Pensions and Veterans' Agency. I don't know if these are the same.
What is most important for the war pensions claim is that you must submit the application forms within, I think, 3 months (maybe 6) of requesting them. Then the good news is that the pensions clock starts ticking from the day they receive the forms back. This means that if they take 10 months to get around to examine your case, and 2-3 months thereafter to make an award, you will receive a payment backdated to the date they first received your application.