I have tinnitus in both ears and fairly severe hearing loss resulting from working on Comets, VC10s, Whirlwinds, Wessex, Phantoms and Hercules. Being a member of the School CCF shooting team with Lee Enfields and no ear defenders probably contributed too. My medical cat was downgraded when I was 45, but by then I was a staff officer in an office environment.
Claim after retirement resulted in a £2500 disability pension which also qualified me for free Bus and Tube transport in London.