<P> The 1963 Act formalized the legal measures by which spirits and other alcoholic beverages should be dispensed, namely 1 / 4 gill (35.5 ml), 1 / 5 gill (28.4 ml) or 1 / 6 gill (23.7 ml), but this was replaced in 1985 by 25ml for single measures, with double measures of 50ml being permitted . From 2001 single measures of either 25ml or 35ml were permitted . Landlords have the option to decide which quantitity they sell, with the difference being caused by historically larger measures being used in Scotland and Northern Ireland . The landlord can chose one or the other but not both . </P> <P> Thimble measures are also used in 175ml and 250ml volumes for measuring wine . Although government stamped for the correct volume, the thimble measure does rely on the user measuring the wine out manually into the thimble . </P>

Where should you pour a drink using a thimble measure