Firstly I would suggest you get sight of the marriage certificate either from the relative or apply for a copy via the GRO. Seeing it is so important, little clues get missed otherwise. The scenario has already changed Dave, originally you thought "RWF" was on the certificate…But now, your not so sure, so he could have been a TA soldier who got married in uniform rather than a regular? Maybe he never had any war service.
To apply for his service record you will need his "Service Number", if thats listed on the marriage certificate…Happy Days. If its not, try contacting the custodian of the RWF Archives:
Dr Kevin Mason - Bodelwyddan Castle (k.mason@bodelwyddan-castle.<wbr>co.uk) and ask him if they can check the Enlistment Role(They will charge for this). I would get the marriage Cert checked first though Dave, as this will possibly provide a definite time marker and proof of when he was serving in the regiment. Without it all you have is hearsay, which makes your task all the more difficult.