a pint of San miguel for £6.80, its not too hefty , its Glasto and you expect to pay more than pub prices

I was on a campsite a few weekends ago down in the new forrest and a bottle of San Miguel was 6 quid, it was a small bottle aswell, a pint of Mango Cider was 8 quid ( wasnt even chilled, they just put 2 bits of ice in it , it was very refreshing though ) cocktails were 10 to 12 quid a go