ukzombie wrote: In laymens terms a BD blouse is otherwise known as the jacket?
Yes. Tunic, jacket, blouse – all synonymous. The term "Battledress Blouse" is probably the most technically correct as this how they are described on most of the maker's labels contained inside. See pic below.
ukzombie wrote: As with the photo of my grandfather he looks like he is wearing his ‘best’ or ‘walking out’ uniform is this right?
Yes. He would, of course, want to look his best for a portrait.
ukzombie wrote: What are the coloured small ribbens just above his left breast pocket, ...what would they represent?
These are the decorations awarded for wartime service / campaign participation. Your grandfather displays British issue decorations: the 1939-1945 War Medal, and either the France and Germany Star or the Italy Star, although based on the description of your grandfather's wartime service he did not seem to qualify for either.
ukzombie wrote: Could I ask where in England did your father live? My grandfather went to Derby
His stay in England was very brief. Immediately after discharge in 1947 he moved to Holland where he found the Dutch much more welcoming and appreciative of the Poles for their substantial contribution to the Allied victory than the British, who looked down on the Poles at this time for several reasons.
Regards,
Tony