Hi Charlie
I am so very grateful for your continued help. I do already have a copy of William's attestation papers from the National Archives. He joined up in 1832 and retired as an invalid in 1847. It simply hadn't occurred to me that he might have received a pension! I am due to go to the National Archives in a couple of days, so will follow it up then.
Many thanks indeed for the suggestion and Happy New Year!
Diana