Genealogy Chat

I know we can’t post photos on here but this puzzle is a bit different than just dating a picture. I’d appreciate any ideas at all because Dad and I are starting to tear our hair out, and he hasn’t got much to pull! I’ll set the facts out in a list to make it easier reading. I have a photograph of three people which appears to be of a bride, bride’s father, and an adult bridesmaid. Dad and I are almost certain that the bride is his mother (my grandma). Dad doesn’t recognise the man, but if it’s grandma’s father then that would be right because he died before Dad was born. On the reverse of the photo is written “5 Sept ‘25” in my grandma’s writing. My grandma definitely got married before September 1925 as I have a copy of their original certificate (dated 30 December 1922). My grandma got married in one of the Plymouth parish churches (her family were from Cornwall) but the photograph is posed outside a country cottage and stone garden wall. Dad and I know Plymouth very well and don’t recognise the place as being anywhere in Plymouth, particularly not the central town street she lived in at the time of her marriage. Dad doesn’t recognise the ‘bridesmaid’ at all. It’s definitely not my grandma’s only sister and, in any case, she got married even before grandma. Bride’s outfit is a dress just below the knee, white stockings and white shoes, veil, headdress and quite a large bouquet. Bridesmaid is wearing ‘best’ dress and hat, and carrying a fair-sized posy. Bride’s father is wearing a suit, buttonhole and what looks to me like a trilby hat (but I might have the style wrong lol!). So the puzzle is ….. Why would my grandma be kitted out like a bride three years after her church wedding? Why isn’t she posing outside the house she was living in at the time of her marriage? Are there any Cornish customs which would explain them ‘dressing up’ like a bridal party? (There is also a photograph of the ‘bridesmaid’ and bride’s father. It looks as if they know each other, and the bridesmaid is wearing a wedding ring). Mandy :)

All suggestions and ideas gratefully received lol!