A few years ago I went to the FoE annual conference in Nottingham. The bar for the first two nights had Marston's Pedigree, which is OK - not may favourite ale but perfectly decent. The lat night we were down to Tetley's keg. I have never, ever, tasted a worse beer. I bought a pint and three hours later I left half of it and went to bed. It didn't make me ill, but the taste was just completely wrong.