<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 and 35ml for single measures , with double measures of 50ml or 70ml being permitted in 2001 . Landlords have the option to decide which quantities they sell , with the difference being caused by historically larger measures being used in Scotland and Northern Ireland . </P>
<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 and 35ml for single measures , with double measures of 50ml or 70ml being permitted in 2001 . Landlords have the option to decide which quantities they sell , with the difference being caused by historically larger measures being used in Scotland and Northern Ireland . </P>
how much is a single measure of spirit
how much is a single measure of spirit
25ml 35ml
25ml 35ml