I HAVE 1 local B&M in Durham with a limited but good selection.... but as Pipestud says..... there's not much you can't get on line in the USA.... Maybe a few G&H...
Some tobacconists in the UK are combined with other goods, like candy or luxury men’s items. I.e. Thorns of Harpenden and Harrison & Simmonds of Bedford. Then there are a classic few like the Black Swan Shoppe in Wakefield, J.J. Fox in London, The Pipeshop in Edinburgh etc. B & Ms are a dying breed and usually their selection is not super wide.
Small shops and supermarkets don’t openly display tobacco and the packaging has warning pictures of victims of all sorts to dissuade you from buying. So there’s not a lot of OTC selling that I can see, or at least have bothered to really check out.
When I am over in England I always trying to pop into B & Ms for the pleasure and to support them, but sometimes traffic and parking are a pain and you can usually save a bit by buying online.
The upside is that Samuel Gawith blends are from my experience easy to find. Also Germains blends can be had over here pretty easily and I am not sure that I have ever seen them for sale in the US. If all I had was Samuel Gawith and Germains to smoke, I would be very happy... oh yeah, throw in some Mac Baren blends as well.
On the upside, when I was in the Black Swan Shoppe last month the owner told me that sales in the last few years have gone up every year, particularly in younger people getting into cigars and then they try out a pipe. There are a few pipe clubs around, with the most high profile probably being Pipe Club Of London.
I think similar to the US, specialty shops of any kind are difficult to maintain without a corresponding online business. Their reach and convenience of online is too hard to beat in what is a niche market. The good news is that we have access to way more blends than our grandfathers did who pretty much smoked one or two blends with a single pipe. They certainly didn’t have the means to cellar either!