I've done a search and found that there's no thread specifically for vintage British suits, which is only natural considering that this forum is mostly dominated by Americans. Out of my three suits which I would consider vintage two are from the UK and one from Australia. I will be posting pictures of them soon.
It would be interesting to see how British suits differ from American ones. My guess (based on my observations) is that British suits are almost always fully lined and almost always made of heavy weight wool. I haven't yet seen a light weight British suit or let alone a linen suit. It appears that Brits were just incredibly tolerant to the heat back in the Golden Era.
So show us your British suits. By British I mean anything made in the British Isles (England, Scotland, Wales, Northern Ireland and the Republic of Ireland) or the Brish Empire.
EDIT: As well as suits, feel free to post sports coats as well as long as they are British.