
The 'Act of Union' two pounds piece was one of two commemorative two pounds designs issued by the Royal Mint in 2007. Only 750 gold proof 'Act of Union' two pounds pieces were issued by the Royal Mint in 2007.
In 1707 the Tercentenary of the Act of Union between England and Scotland was passed and James I of England (who was previously James VI of Scotland) became King of both countries. The two countries moved towards a union under one monarch, although it would be another hundred years before they would unite under a single parliament. The coin celebrates 300 years of the Act of Union between England and Scotland.

Designed by Yvonne Holton, the reverse is divided into four quarters, with a rose and thistle occupying two of the quarters, and a portcullis in each of the other two quarters. The whole is overlaid with a linking jigsaw motif and surrounded by the dates '1707' and '2007', and the denomination 'TWO POUNDS'. The edge inscription reads 'UNITED INTO ONE KINGDOM'.
Queen Elizabeth II's fourth portrait can be seen on the obverse, designed by Ian Rank-Broadley.
The two pounds piece is made of solid 22 carat gold (Gold Fineness of 0.916), and weighs 15.98 grams. It has a diameter of 28.40mm.

The outer disc is made of 'red' gold, with the inner disc being 'yellow' gold.
The coin was originally packaged in a Royal Mint acrylic screw top capsule and presented in a Royal Mint green leatherette case, accompanied with an individually numbered certificate of authenticity (COA).