Good morning Kooky
I have to go out for the morning, but a quick root to the back of the bookshelf has revealed a jumble sale purchase from a couple of years ago "Wedding Fashions 1860-1980" by Avril Lansdell. I'm taking the book with me (I have to be a gallery attendant this morning and sit minding the exhibits in the college art show). So by about 1.45 this afternoon, I hope to be an expert in collars, necklines and spats
One line has me revising 1912 as possible date and moving forward a bit:
"middle class and working men wore lounge suits, usually dark (blask or blue) and carried trilby hats, the new smart wear of the ex-serviceman..."
so could be an immediately post-war picture then

Barbara