In the record I can see on FindMyPast the groom's name is Joshua ASKEW, a Private in the 69th Regiment of Foot. The date of the marriage was 28th February 1825. This may be a complete red herring, but FindMyPast also has a couple of pages referring to a Joshua ASKEW, Private in the 69th, who servd in India (the document mentions St. Thomas' Mount), and had served at Waterloo. This Joshua ASKEW is shown as transferring to the 1st Regiment of Foot on 19th July 1824 and being discharged on 29th May 1829. This man received the Waterloo Medal and also the Army of India Medal with Ava Clasp, and there's a file on him at TNA (which may be the same as the document on FMP). Perhaps just coincidence, but I thought I would mention it.
Thanks heaps for all that It is amazing what you wonderful people find. I just wish I could get any info on Mary Ann Young as her life is a blank page. Cheers and thanks Pat