The original £1 coin was introduced as a round coin in 1983 to replace the Bank of England £1 note.
The current 12-sided £1 was first circulated on the 28th March 2017 alongside the old style coin for a few months until the older type was demonetised on the 14th October 2017.
Two 12-sided £1 coins have officially been released (one dated 2016 and one dated 2017). More information on new £1 varieties here.
Specifications of the £1 coin are shown at the bottom of this page.
Details of all £1 coins are shown on separate pages, linked to below (click on text to see details for that date. Click on the image to see a larger version of that design):
|2016 One Pound||2017 One Pound|
Text only links, in case the table above does not display correctly:
UK £1 coin specifications:
2016 onwards (12-sided):
Size: 23.03mm flat to flat, 23.43mm point to point.
Thickness: 2.8mm (published) but one checked from a BU set is 3.03mm to 3.1mm at the rim.
Metal Composition: Outer ring: 70% copper, 5.5% nickel, 24.5% zinc (referred to as nickel-brass). Inner round piece: nickel-brass plated with nickel.