That's inflation for you. When I started drinking, bitter was 3% or 3.5%, strong bitter was 4.5% or 5% and anything more was a recipe for disaster. I'm sure I used to risk a barley wine at 7% occasionally. And in looking up "barley wine" on wikipedia I was delighted to discover that there are references in Hippocrates, Aristotle and Polybius - and a
learned article from Canada with more notes than text, on the subject of whether the Greeks drank beer which reads like someone who's made his mind up that it was a nasty barbarian affectation and is looking for evidence to support his case. I want someone to pay me to write papers like that.
Anyway. The "Club Hammer" Chocolatey London Stout was rather delicious.
(and edit:
http://www.mostlyaboutbeer.co.uk/popes-yard-brewery/ talks about a Brett sour with spruce, just to prove that they've got impressive beardage.)