Trading Standards
If you have any issues relating to such things as the pub's lack of price list, refusal to fill your pint, price queries etc., you should contact your local Trading Standards office.. The Trading Standards Service is divided broadly into two main areas of work, namely Consumer Advice and Trading Standards Enforcement.
If you would like more information about issues relating to Trading Standards this is available at the Chartered Trading Standards Institute, a one-stop-shop for consumer protection information in the UK.