The bi-metallic £2 coin is the largest circulating coin denomination of the Pound Sterling. It was introduced in 1998 (earlier two pound coins were made of Nickel brass, were intended as commemorative, and did not circulate much). Being bi-metallic means that the coin comprises two separate components of differing alloys - a Nickel-Brass outer ring with inner circle of CuproNickel.
The Royal Mint maintains a "definitive" style of the £2 issued annually, as well as a large variety of one-year circulating commemorative types and some Non-Circulating Legal Tender (NCLT) £2 coins for collectors. Between 1997 and 2015, the definitive type was the Technology type £2, which was then changed to the Britannia type £2.
The one-year type coins celebrate important anniversaries or people, as well as iconic aspects of British culture and history.
This circulating commemorative £2 coin marks the 100th Anniversary of the First World War and the role and contribution of the Royal Navy in it.
This is the second coin in a five-year series, on a journey from "outbreak to armistice". In 2015 The Royal Mint’s programme of commemoration marking the centenary of the First World War continued with this United Kingdom £2 coin honouring the Royal Navy. With a detailed design featuring a mighty battleship, this coin captures the strength of a force whose contribution to victory in the First World War deserves to be remembered.
The official effigy of Queen Elizabeth II changed during the year. The coins first struck for the annual brilliant uncirculated and proof mint sets had her Fourth Portrait by Ian Rank-Broadley; these coins were struck for circulation later in the year and have the Fifth Portrait by Jody Clark.
£2 coins issued in 2015 have now been in circulation for nine years. | 
Search for United Kingdom: Two Pounds 2015 Royal Navy (Fifth Portrait) on eBay 
