Possible Clues:

• Beer makes you stagger and feel ill we're told
• Having drunk a litre – about a litre – finally appreciate beer
• All are drunk having consumed English beer
• Are all sozzled imbibing English beer?
• Beer club in Madrid backed by articles in two languages
• Always keeping wordless singing up? It's the booze
• Booze, old style, and stagger -- trouble by the sound of it
• Concerned with a foreign airline that's brought up alcohol
• All are mad about English beer
• All are staggering having consumed English booze