Fourth crowned portrait of HM Queen Elizabeth II facing right, wearing the Girls of Great Britain and Ireland tiara.

The Girls of Great Britain and Ireland tiara was a wedding present in 1947 from her grandmother, Queen Mary, who received it as a gift from the Girls of Great Britain and Ireland in 1893 on the occasion of her marriage to the Duke of York, later George V. Made by E. Wolfe & Co., it was purchased from Garrard & Co. by a committee organised by Lady Eve Greville. In 1914, Mary adapted the tiara to take 13 diamonds in place of the large oriental pearls surmounting the tiara. At first, Elizabeth wore the tiara without its base and pearls but the base was reattached in 1969. The Girls of Great Britain and Ireland Tiara is one of Elizabeth's most recognisable pieces of jewellery due to its widespread use on British banknotes and coinage.

ELIZABETH II DEI GRATIA REGINA FIDEI DEFENSATRIX means Elizabeth II, by the grace of God, Queen and Defender of the Faith.

Engraver: Ian Rank-Broadley

The design depicts Royal Shield of Arms.

The royal coat of arms of the United Kingdom, or the Royal Arms for short, is the official coat of arms of the British monarch. The shield is quartered, depicting in the first and fourth quarters the three passant guardant lions of England; in the second, the rampant lion and double tressure flory-counterflory of Scotland; and in the third, a harp for Ireland.

Engraver: Matthew Dent

DECUS ET TUTAMEN — Latin for "An ornament and a safeguard", a phrase taken from Virgil's Aeneid, and here referring to the fact that the inscription serves both as a decorative feature and as a safeguard against the clipping of the coin's edges (this is not a modern concern, but harks back to the days when circulating coins were made of precious metals). This appears on coins with English-themed, Northern Irish-themed or general UK-themed designs.