Thanks to the advice of knitmanaic, I went directly to the two wools that I know are British and looked up where you can buy them. Then I started search for shops! Oh my, that worked quite well. Well, except for one of them. It was an online shop advertising as a physical store front. Anyway, I made a score at the one in Broughton Astley. I purchased enough wool for two scarves. Both are for Nick's cousins who have been hosting us. I started both last evening.
Now, I just wait for the stuff I ordered to get here. The shop didn't have all of the ones I wanted, but, they credited me the rest and we are off again. YAY! I can't wait to see what comes in the post tomorrow.