The birth of decimal coinage

On 15 February 1971, Britain woke up to a new currency. The old system of pounds, shillings and pence – with 240 pence to the pound – was replaced by decimal coinage, where 100 new pence made a pound. The change had been planned for years. The 5p and 10p coins had already been circulating since 1968, matching the value of a shilling and a florin. The 50p, introduced in 1969, was the world's first seven-sided coin, designed to be easily distinguished by touch and sight. The halfpenny, penny, twopence, five pence, ten pence and fifty pence formed the first decimal set. It was a practical revolution, but also a cultural one: the nation's small change would never look the same again.

The original designs and their symbols

Christopher Ironside won the competition to design the reverses of the new decimal coins. His approach was heraldic and deeply British. The 1p carried a portcullis, a symbol of Parliament and security. The 2p showed the Prince of Wales's feathers. The 5p featured a thistle, the national flower of Scotland. The 10p displayed a lion, representing England. When the 20p was added in 1982, it bore a Tudor rose. The 50p, first issued in 1969, showed Britannia, a figure that had appeared on coins since Roman times. The obverse, meanwhile, carried Arnold Machin's portrait of the Queen. These designs were not chosen at random. Each one spoke to a part of the United Kingdom's identity, and they were meant to be learned and recognised by everyone.

How the coins changed over time

Decimal coinage has never been static. The halfpenny was withdrawn in 1984, a victim of inflation. The 20p arrived in 1982, and the £1 coin followed in 1983. The £2 coin first appeared in 1986 as a commemorative piece, but it was the bi-metallic version of 1997 that became a regular circulation coin. Sizes and compositions changed too. The 5p was reduced in diameter in 1990, the 10p in 1992, and the 50p in 1997. In 2017, the round £1 was replaced by a new 12-sided coin with a hidden security feature, making it much harder to counterfeit. Through all this, the 1p and 2p have endured, though their future is occasionally debated in the press. Each change reflected practical needs – weight, cost, vending machines – as much as aesthetic ones.

Artists who shaped your pocket change

Ironside was not the only artist to leave a mark. In 2008, Matthew Dent designed a new reverse for the 1p to 50p coins. When arranged correctly, the six coins formed a single image of the Royal Shield. It was a clever, puzzle-like design that encouraged people to look at their change more closely. David Pearce created the 2017 12-sided £1, which features a rose, leek, thistle and shamrock emerging from a crown. The obverse portrait has also changed. Arnold Machin's effigy gave way to Raphael Maklouf's in 1985, then Ian Rank-Broadley's in 1998, and Jody Clark's in 2015. Each artist had to work within tight constraints: designs must strike cleanly, wear well, and be instantly recognisable. It is a balancing act of art and engineering.

Notable designs and the stories behind them

The 50p has become a favourite for commemoratives. Since 1973, it has celebrated everything from the European Community to the National Health Service. The 2009 Kew Gardens 50p is the most famous modern rarity, with a mintage of just 210,000. The 2011 Olympic series offered 29 different designs, from aquatics to wrestling, and many are still sought after. The £1 coin has also carried many reverses: the 1983 royal shield, the 1988 shield of arms, the 1994 lion rampant, the 1998 lion, the 2003 bridge, the 2008 shield, and the 2016 nations of the UK. The £2 coin has marked the Gunpowder Plot, the 2012 Olympics, and the centenary of the First World War. Each design is a small history lesson in your pocket.

Practical tips for decimal coin collectors

Collecting decimal coins is accessible and affordable, but a little knowledge goes a long way. Start by checking your change for key dates and varieties. The 2008 20p with no date on the obverse is a well-known mule. The 2016 round £1 coins, minted only for sets, have low numbers. The 2009 Kew Gardens 50p is the one to watch for. Here are some practical steps:

• Check mintages: Low mintage does not always mean rare, but it is a good starting point. A coin with under 500,000 minted is worth a closer look.
• Look for errors: Off-centre strikes, wrong planchets, and undated coins can be valuable. Compare your coins to a reliable catalogue or online guide.
• Handle with care: Hold coins by the edges. Avoid cleaning them, as this removes patina and reduces value. Store them in acid-free pockets or capsules.
• Buy a good reference: A current coin catalogue will give you mintages, varieties, and values. It is the best few pounds you will spend.
• Focus on a theme: You could collect 50p commemoratives, £2 designs, or coins from a single year. A focused collection is easier to manage and more satisfying.

Above all, enjoy the hunt. Every coin in your pocket has a story, and with a little curiosity, you can uncover the history, art and politics that shaped modern Britain's change.