Hello Ken,
Thanks for your info, I've read the page on your link - very interesting.
I do have his 'Certificate of Service' which does have quite a lot of information but only names the 3rd Hussars on his 'Final Assessments of Conduct & Character on Leaving the Colours'. On the 1st page it says Corps for which Enlisted: 'Corps of Hussars of the Line'. On his service record is just has Hussars and where it describes which corps he is being transferred from, to the reserves, it states 'Corps of the Cavalry'.
Rgds
Phil