I notice you have a few queries about Portman Press Bureau where I worked in the fifties and sixties.
It was the largest firm of Society wedding photographers in London and was a family firm, build up from it’s beginnings in the 1920’s in Portman Square, hence the name. It’s demise came about when plate cameras gave way to film and the family retired. There were branches of the firm in Dorset and Cambridgeshire.
and this from Doug Scott who also worked at Portman – and Belgrave Press