1.5 oz.
21
Most UK "shots" glasses are 35mil capacity - There are other sizes up to 50mil. However, you can achieve 20 shots (35mil) from a 70cl bottle.
180
Standard single measure is 25ml, however some establishments have move onto a 35ml measure. It should always be openly displayed in the pub/bar as to what measures they use. By law this measure is only applicable to whisky, gin, vodka and rum. But most places will use it for all their 'spirits'.
Whatever the landlord decides. The weights and measures act for spirits in the UK includes gin, rum, vodka and whisky and does not cover sloe gin or any other spirit or liqueur. Though generally these are also dispensed in measures of 25 or 35 ml or multiples thereof, at the discretion of the licensee.
vodka
A pub measure in Scotland typically refers to a standard measure of alcohol served in a pub, such as a single shot of whisky (25ml) or a pint of beer (568ml). Pub measures are regulated by law to ensure consistency and consumer protection.
A standard measure of a martini in a pub is typically 2 ounces of liquor, such as gin or vodka, with a small amount of vermouth. However, the exact measurement can vary depending on the establishment and customer preferences.
50ml or multiples there of.
Pub (pub) or bistrot (bistro).
Every pub.
Standard single measure is 25ml, however some establishments have move onto a 35ml measure. It should always be openly displayed in the pub/bar as to what measures they use. By law this measure is only applicable to whisky, gin, vodka and rum. But most places will use it for all their 'spirits'.