Pint Glass - United Kingdom Law

United Kingdom Law

In the United Kingdom, draught beer must be sold in Imperial measure (see Pint#Effects of metrication). United Kingdom law requires certain steps be taken to ensure that a pint of beer is indeed a pint. Though this can be achieved using so-called "metered dispense" (calibrated pumps), the more common solution is to use certified one-pint glasses. Until recently these had a crown stamp and number etched upon them indicating that the certification had been done by an agency of the Crown. In Ireland a harp was used to denote official certification.

Under the EU Measuring Instruments Directive (Directive 2004/22/EC), the cetification of measuring instruments and devices used in trade (including beer mugs, weighbridges, petrol pumps and the like) can be done by third parties anywhere within the EU with governments taking "only the legislative and enforcement (market surveillance) functions" and "ensuring that the system of third party assessment ... has sufficient technical competence and independence" (or, in simple language, calibration services were privatised). Glasses that have been certified by authorised firms anywhere within the EU have the letters CE etched on with the certifing agency's identification number. Conservatives campaigning to have dual markings of crown and CE were informed by EU Commissioner Günter Verheugen that "a Crown stamp look-alike could naturally be affixed to the glass, as long as it is done in such a way that it is not confused with the CE marking".

Selling beer in unmeasured glasses without using some other form of calibrated measure is illegal. Half-pint and one-third pint glasses are also available, and are subject to the same laws.

Despite this emphasis on accurately measured glasses, there is a practice of defining a pint of beer and lager as only 95 per cent liquid. It is common for drinkers to be served less than a full 568 ml pint of liquid — either because too much of the glass is taken up by a foamy "head", or simply because the customer has been sold a short measure. This allows publicans to sell more beer than the stated capacity of the cask or keg and hence save money. This practice may have consciously increased since the removal of a duty allowance on ullage (wastage). To counter this the British Beer and Pub Association have issued guidelines for bar staff to respect a customer who asks for a 'top up' to a full 568 ml pint.

For those wishing to avoid this practice while still serving beer with a large head, "lined" or "oversized" glasses are available. These have a line near the top (usually labelled "pint to line") to which the beer should be poured, with the head forming above it. In the past a number of breweries supplied these glasses to their pubs; this is now rarely the case and lined glasses are found mostly at enthusiasts' events such as beer festivals, serious cask ale pubs, and breweries' own bars. The use of lined 568 ml pint glasses in pubs is advocated by the Campaign for Real Ale. In Australia, however, this style of glass is universal, with the exception of South Australia, which sells pints in a 425ml glass.