The importance of security features on UK coins

When it comes to the coins jingling in your pocket, the Royal Mint employs a number of sophisticated techniques to ensure each coin is secure and genuine.

But how much do you actually know about the security features that keep your coins safe?

Visible security features

Bi-metallic design

The distinctive bi-metallic design seen in coins like the twelve sided £1 coin and post 1997 £2 coins is not just an aesthetic choice, but an advanced security feature. The combination of two different metals – a nickel-brass outer ring and a cupronickel inner core – increases the complexity of the minting process, making fraud significantly more challenging.

Bi-metallic £2 and £1 coins
Bi-metallic £2 and £1 coins

Milled edges and edge lettering

First introduced by the Royal Mint in the 1660s, the complex process of adding milled (grooved) edges or edge lettering to UK coinage not only provides a high degree of visual security, but also makes the coins difficult to counterfeit accurately.

The UK £2 coin has a milled edge
The UK £2 coin has a milled edge

Lenticular features

Special lenticular imaging is another ingenious feature incorporated into some UK coinage. This involves an image that changes appearance when the coin is titled at different angles. The bi-metallic £1 coin, first issued in 2017, showcases this feature beautifully. When tilted, the pound sign (£) changes to the number one (1), creating a dynamic visual effect that is not only mesmerising but also serves as a powerful deterrent against counterfeiters.

Lenticular feature on the 12-sided £1 coin shows the ‘£’ symbol and the number ‘1’ when tilted

Fine engraving, design decisions and micro-lettering

The introduction of new cutting techniques for steel tooling, combined with advancements in computer-aided modelling, has enabled coin designers to incorporate previously unattainable details. These details are as complex as those on a banknote but benefit from being three-dimensional.

Some bi-metallic coin designs extend across both the inner and outer sections of the coin, adding a layer of complexity that helps deter forgery.

The reverse design on the 12-sided £1 coin is struck across both the inner and outer section of the coin

Certain coins even include micro-lettering, an advanced design feature that’s hard to produce with consistent quality. For example, the lower inside rims of both the obverse and the reverse of the twelve sided £1 coin feature micro-lettering.

The £1 coin features micro engraving on the lower inside rims.

Shape

The introduction of the dodecagonal (twelve sided) £1, first issued in 2017, serves as another security feature. The distinctive shape of the coin makes it much more difficult to counterfeit compared to the previous round pound design.  

Hidden Security Features

Secret messages (Electromagnetic signature)

Some new coins are fitted with a special plating that contains an electromagnetic signature (EMS). When passed through a small electromagnetic field, each coin creates ripples or other disturbances that can be detected and analysed. Different combinations of size and metal cause distinct patterns when the coins are passed through such a field. The distinct pattern of a particular coin is called its ‘electronic signature’.

Details of the security features on the 12-sided £1 coin

‘Hidden’ unknown security feature

The Royal Mint announced that the twelve sided £1 coin includes a secret ‘High Security Feature’ which is even more advanced than an Electromagnetic Signature. Details of this feature are top secret, but it’s thought to involve material within the plating layer of the coin which can be detected when electronically scanned by coin-counting or payment machines.


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A Legendary New Coin – The Little John £5

Every leader needs a loyal lieutenant, and that’s exactly what Little John was to Robin Hood in the English folklore story. The third and final coin in the Robin Hood Collection features none other than the towering warrior himself, Little John.

2024 UK Little John £5

A powerful design

The reverse design, by Jody Clark, shows Little John standing tall amongst the trees of Sherwood Forest, quarterstaff in hand. John was was known to be a master of the quarterstaff, a traditional European polearm dating back to the mid-16th century.

The design is actually taken from the 2022 Little John Bullion coin, which was part of the Royal Mint’s Myths and Legends bullion mini-series.

2024 UK Little John £5 Reverse and Obverse

To highlight the dynamic design, your 2024 UK Little John £5 has been struck to a Brilliant Uncirculated quality – the standard favoured among collectors.

Who is Little John?

Little John appeared in some of the earliest versions of Robin Hood ballads and stories – some dating back to the 15th century! He is predominantly known as Robin Hood’s chief lieutenant and second in command of the Merry Men.

Sometimes depicted as nearly 7 foot tall and incredibly brave and strong, “Little” John gained his ironic nickname in reference to his large frame.


Robin Hood and Little John from the cover of the1912 novel Bold Robin Hood and His Outlaw Band: Their Famous Exploits in Sherwood Forest.
Robin Hood and Little John from the cover of the 1912 novel Bold Robin Hood and His Outlaw Band: Their Famous Exploits in Sherwood Forest.
Image Credit: Louis Rhead, Public domain, via Wikimedia Commons

Little John has been portrayed in countless ballads, literature, plays, TV shows and films, but it was in a 17th century Robin Hood ballad, where John and Hood’s first meeting was described in most detail.

Little John tried to prevent Hood from crossing a narrow bridge, whereupon they fought with quarterstaffs, and Robin was overcome. Despite having won the duel, John agreed to join his band and fight alongside him – this is now the most popular explanation of how the two outlaws met.

Previously in the Myths and Legends series…

The 2024 Little John £5 coin is the final coin in the Robin Hood Collection, which has previously featured the Robin Hood £5 and the Maid Marian £5.

Robin Hood £5 Collection
Robin Hood and Maid Marian

Prior to the Robin Hood Collection, the first three coins in the Myths and Legends series focused on Arthurian Legends. The series kicked off with the King Arthur £5, followed by mythical wizard Merlin and concluded with shapeshifter and witch, Morgan Le Fay.

Arthurian Legends £5 coins 
King Arthur, Merlin and Morgan le Fay
Arthurian Legends £5 coins
King Arthur, Merlin and Morgan le Fay

The Myths and Legends £5 series has united minting excellence with timeless legends of British folklore, featuring some of the most legendary mythical characters ever.

Do you have any of these coins in your collection? And what legend or folklore story would you like to see feature on UK coins? Let us know in the comments below!


Continue your Myths and Legends collection

Secure your 2024 UK Little John £5 for just £13.99 (+p&p) >>

The D-Day 50p Face Value Giveaway

2024 marks 80 years since the historic event that turned the tide of the Second World War, forever remembered as D-Day. In commemoration, The Royal Mint has struck an official UK 50p.

This UK legal tender coin hasn’t entered circulation. However, we feel that a coin as momentous as this should be more widely available. Which is why we’re giving collectors the chance to get their hands on one for FACE-VALUE. That’s JUST 50p, POST FREE!

In fact, we have an incredible 7,000 D-Day 50ps up for grabs at this special face-value price…

So how can you get your hands on one?

Every time a new UK 50p is released, collectors on our Coin Launch Ballot list are given the opportunity to own the new issue for just 50p. Indeed, 1,000 Change Checkers are already lucky launch ballot winners able to secure this special offer.

1,000 further coins were available for the nation to own at face-value as in our National Ballot.

And, that’s not all, as we’re also taking this 50p with us to our upcoming live events, with an additional 5,000 coins available to swap!

5,000 D-Day 50ps Available to Swap at Change Checker Live!

We took 2,000 D-Day 50ps to Duxford Air Show on 1st and 2nd June to swap for just face value. You can watch the highlights from the show here >>

Make sure you’re following us across our social channels for details of our next event later in the year, where we’ll be swapping our final batch of D-Day 50ps at face-value!

An All-Time Favourite 50p

It’s been 30 years since the UK’s first D-Day 50p was released – struck to the larger specifications that can no longer be found in your change.

6.7 million of these were released into general circulation in 1994, but were removed when the new, smaller 50ps were issued in 1997.

However, this still proves to be a much-loved coin and was even voted as the all-time favourite 50p amongst Change Checkers.

As such, the new D-Day 50p promises to be highly sought-after collector coin.


Can’t wait to own the NEW D-Day 50p?

If you can’t wait to get your hands on the UK’s official D-Day 50p in superior collector quality, you can order yours for £8.99 here >>