I would have put a £10 on my card for the gas so I can warm myself. Also you need £10 on another card for the electricity to set fire to the gas.
They get you both ways.
Readers: Pity you drank it before you even got to the shop.
Self: Now I am cold.
sorry, just scraping some poo off my "w" key.
Readers: How sure are you that sea-going pterodactyls were coloured the same way as gulls?
Self: One of them fuckers ate my gas card.