[David_Hayward (RIP)]

To get Mum's birth certificate is going to be easy-peasy now! The Register Office for Bridport, where presumably she was born, will have the archives on file. Just give them the maiden name and date of birth and pay their fee! That certificate will give you the father's name + occupation + address.

How Grandad ended up as a Market Gardener and marrying a girl from 76 miles away I can only speculate....was she in the Women's Land Army in the Upavon region? Or in the Services? In a civvy job on an Army base? NAAFI? That said the Marriage Certificate will say what her occupation was.

I would try the Legion next and see if they can help.