He definitely got on the booze in Ireland at about age 7 though I think? Sure I remember reading in ‘A Drink With Shane MacGowan’ that he nicked a load of stout, got hammered and hallucinated.
It’s a fairly good read that book, although his (then?) wife who narrates it could do with being a bit less superlative. The best bits are the little things like when he’s describing how much he loves a beetroot binge.