Those stall holders that were selling them for £4.50. I hope hardly anyone was silly enough to buy any those ridiculously overpriced Red Bull cans. That would serve them right.
On a similar note, I note from that poster of the price of drinks at that Lytham Festival. £3.00 for a 250ml can of Rockstar!!!! I like Rockstar drinks, but there's no way I'd pay those sort of prices. Normally the price of these are £1.29 for 500ml cans! At this festival, 500ml of Rockstar comes to 6 quid!!! Absolutely INSANE!!!