Camping gas for camping stoves?

I recently bought a gas camping stove from ASDA which doesn't come with the gas cylinder and nor do they sell it. I've tried all the local camping shops, B and Q, Wicks and cannot find any in there either? It says to buy buthane/propane 907 or calor gas cylinders but im struggling to find any locally anywhere. Trouble is I dont have time to order any off the internet as we go this friday. Does anyone know where I can buy this gas from and when is says 'calor gas' does this mean any bottle of calor gas? Im in North East Lincs (Grimsby)