Touring the Fuller's brewery years back, the guide started talking about a beer they brewed from the brewing logs with the help of Ron Pattinson. These were in the Past Masters series they brewed.
The guide said the beer was made with Plumage Archer malt. After some inquires they found some was being grown by an eccentric old chap on his country estate. They were able to buy some and have it malted.
The guide was a real character, he turned and said "You may have heard of that eccentric old chap, his name is Prince Charles"
This may or may not be a true story, as he was a brewery tour guide.