Having realised (OK, been told!) that there is, indeed a sheet issue of the 1st Class amethyst definitive, I thought I really ought to get one. So where do you go if you want a stamp? Apart from the supermarket (they tend only to have books) and let's say your car uses vast amounts of fuel or is one of the VWs, Audis, Seats or Skodas that had the software to deceive emissions test devices fitted and you are very worried that you may damage little children. Yes, well done! You go to the Royal Mail web site.
They have an online Shop. It isn't very good, though. I failed to find any 1st Class amethyst sheet stamps. They have the booklets and miniature sheets but not the 'normal' stamps.
I see that they still have the old and horrible PIP designs for what they cheerfully call Everyday Stamps!! That illustration has been there for years. They also have several cups of tea dotted around the place - not something a true collector would risk so close to mint items!
The site may be useful for business things and for finding people's post codes and rates for parcels to Outer Mongolia but not, I'm afraid, of much help to collectors. What surprises me is that Royal Mail haven't put The Philatelic Bulletin online. It would be comparatively easy to do and could be restricted to subscribers if they really wanted to. At least then, however, we could access information and buy items consistently and without getting hot and bothered enough to write ruddy articles about it.
Clearly I shall have to drive into town and buy a stamp. It has just occurred to me that I didn't even get a copy on what I had thought was a pretty comprehensive supply request list with Edinburgh. Very odd.