Been at a conference all day in London, v tedious. Getting train to stay with family for the weekend and thought I'd have a small bottle of fizz on the way...it is fizzy Friday after all (to be fair every Friday is fizzy Friday). Just been told (by a rather attractive man) that drinking fizz on a train at this time is not the done thing. I think he's just jealous but wonders if there was some kind of London commuter etiquette that I'm unaware of, coming from the country?!