Why is it some maltsters, Thomas Fawcett for example, sell malt by barley variety (maris otter, optic, golden promise, etc.) but some sell malt labeled only pilsner, pale, ESB, etc. without specifying the variety used?
If no variety is specified, does that indicate it is likely a blend?
Also, no one seems to denote the variety used for any of their specialty malts. Is there a particular reason for that?