Latest 50p in the Innovation in Science series celebrates century of ground-breaking Insulin discovery

The UK’s Innovation in Science 50p Series continues as the BRAND NEW 2021 UK Discovery of Insulin 50p has just been released – commemorating 100 years since this groundbreaking finding!

Saving millions of lives around the world and triggering a century of diabetes research, the discovery of Insulin in 1921 by Sir Frederick G Banting, Charles H Best and JJR Macleod was one of the greatest medical breakthroughs in history.

2021 UK Discovery of Insulin 50p

In this special anniversary year, this life-changing hormone features on the UK’s most collected coin for the very first time.

The design, by Iris De La Torre, features an artistic interpretation of the structure of Insulin along with its molecular formula.

Today, you can own the brand new 2021 UK Discovery of Insulin 50p in superior Brilliant Uncirculated quality for JUST £4.50 (+p&p).

What’s more, your coin has been protectively encapsulated in Official Change Checker packaging with that all-important hologram to guarantee its superior quality.

Secure your 2021 UK Discovery of Insulin CERTIFIED BU 50p today by clicking here >>

Whilst this is the first UK coin to celebrate the discovery of Insulin, The Royal Canadian Mint issued a special collector’s set earlier this year to celebrate this historic anniversary…

2021 Canada Discovery of Insulin Collector Card

Whilst 2021 marks 100 years since Sir Frederick G Banting, Charles H Best and JJR Macleod first discovered Insulin at the University of Toronto, it was later purified by James B Collip.

To celebrate this historic anniversary and one of Canada’s most significant contributions to modern medicine, The Royal Canadian Mint have issued a special collector’s set.

Included within this set you’ll find two versions of the 2021 Discovery of Insulin $2, with a design portraying the story from laboratory to the isolation of insulin.

As well as the two Discovery of Insulin $2 coins, the set also includes five other denominations issued in 2021, perfectly displayed within the colourful collector card explaining the importance of this Canadian medical breakthrough that changed the world.

Just 100,000 sets have been issued for collectors worldwide and we’ve managed to secure an initial allocation of just 250 for UK collectors!

With such a significant anniversary and the inclusion of the selectively coloured $2 coin, high demand for this set is expected – so make sure you don’t miss out! You can secure your 2021 Canada Discovery of Insulin Collector Card today for JUST £22.50 (+p&p) here >>

This exciting new 50p is the very latest addition to The Royal Mint’s Innovation in Science series which has proven incredibly popular with collectors…

2021 UK Charles Babbage 50p


Charles Babbage was an English mathematician and inventor who originated the concept of a digital programmable computer.

In 2021, in the year marking the 150th year of his passing, The Royal Mint commemorated him on a UK 50p – an addition in their Innovation in Science series.

This 50p, designed by Nigel Tudman and Jas Bhamra, features a clever design which links Babbage’s extraordinary machinery to the digital age.

You can secure this coin for your collection for JUST £4.50 (+p&p) here >>

2021 John Logie Baird 50p

It’s hard to imagine life without television but back in the early 1920s, it was a complete unknown.

That was until John Logie Baird successfully produced televised objects in outline in 1924transmitted recognisable human faces in 1925, and demonstrated the televising of moving objects in 1926.

Issued in 20201, to celebrate the life and works of the ‘Father of Television’the design of this 50p coin features key milestones from Baird’s life, presented between the lines of transmission radiating from the centre of the coin.

2020 Rosalind Franklin 50p

In the year that would have marked her 100th birthday, The Royal Mint released a 50p celebrating the life and crucial work of Rosalind Franklin, the first female scientist to be commemorated on a UK coin.

David Knapton’s striking design of this coin, features a depiction of Rosalind Franklin’s X-ray, ‘Photograph 51’, which revealed the helical structure of DNA, in her laboratory at King’s College, London.

One of Britain’s greatest scientists, Franklin made a crucial finding to the discovery of the double-helix structure of DNA.

2019 Stephen Hawking 50p

In 2019, less than a year since his death, The Royal Mint released a Stephen Hawking 50p coin, honouring his works as one of the most influential physicists of the modern age.

He became the very first person to be celebrated in The Royal Mint’s Innovators in Science series and only the third person to be commemorated on a coin within a year of their death (the others being Winston Churchill and the Queen Mother!)

The reverse of the coin, designed by Edwina Ellis, features a stylised black hole and the inscription ‘Stephen Hawking’ . It also shows the Bekenstein-Hawking formula, which describes the thermodynamic entropy of a black hole!


The Innovation in Science series has proven incredibly popular with collectors and we’re sure this brand new 2021 UK Discovery of Insulin 50p will be in high demand…


Secure the 2021 UK Discovery of Insulin 50p for your collection for JUST £4.50 (+p&p)

Secure the brand new 2021 UK Discovery of Insulin 50p in superior Brilliant Uncirculated quality for JUST £4.50 (+p&p) by clicking here >>

What’s more, your coin has been protectively encapsulated in Official Change Checker packaging with that all-important hologram to guarantee its superior quality.

Secure your 2021 UK Discovery of Insulin CERTIFIED BU 50p today by clicking here >>

Time to go ‘Through the Looking-Glass’ one more time…brand new Alice 50p coins from the Isle of Man!

Earlier in the year Change Checker revealed a brand new set of Alice’s Adventures in Wonderland 50p coins, authorised for release by the Isle of Man Treasury!

Well today, we have had word that the FINAL 50p coins have been released to celebrate the sequel of Lewis Carroll’s tale nonsense, ‘Through the Looking-glass, and What Alice Found There’.

Alice Through the Looking-Glass 50p Set

Prepare yourself to fall down the rabbit hole one last time with FIVE BRAND NEW 50p coins, each featuring a new design by renowned illustrator Stephen Lee. The designs of these coins are equally as captivating as the first set and likewise depict characters from the book with excerpts of their known quotes, including:

  • Alice “Life what is it but a dream”.
  • The Red Queen “The Queen cried ‘faster, faster!’”
  • The White Queen “That’s the effect of living backwards”.
  • Tweedledum & Tweedledee “There’s nothing to cry about!”
  • March Hare “There’s nothing but hay left now”.

Which coin is your favourite? Let us know in the comments below!

Just like the first BU 50p Set released, only the Alice Single 50p coin will be issued individually. But, you can secure all five stunning coins in Brilliant Uncirculated quality, protectively housed in a bespoke presentation pack, carefully curated by the coins’ designer.

To secure the Alice, Through the Looking-Glass 50p BU Set for your collection for JUST £31.25 (+p&p) click here >>

Strictly Limited Edition

But, if you’re looking for the crème de la crème of these coins, you won’t want to be late for the extremely limited Silver Proof versions

Silver 50p coins are, without doubt, the collector’s favourite and a sell-out is inevitable. 

The complete set is strictly limited to just 1,995 worldwide. When compared to the sell-out story of the 2019 UK Gruffalo Silver Proof 50p, which had a mintage of 25,000, it’s almost certain there will not be enough of these Alice, Through the Looking-Glass Silver Proof 50p sets to satisfy demand.

You can secure yours for your collection by clicking here >>

Alice’s Adventures in Wonderland 50p Coin

The Alice 50p coin above is the only coin from the collection to have been issued individually, and it celebrates none other than the main character herself, Alice.

The coin, struck to Brilliant Uncirculated Quality, features a carefully curated design of Alice, peering through the looking-glass on her return to Wonderland, alongside a quote from the book; “Life what is it but a dream”.

This coin is available to order today in Brilliant Uncirculated quality for JUST £6.25 (+p&p) and comes protectively housed in a bespoke presentation pack – the perfect pairing I am sure you agree!

And remember, for those collectors looking for a little bit more adventure, this brand new coin is also available in stunning .925 Sterling Silver with an edition limit of JUST 4,995!

Struck to a pristine Proof finish, with the added extra of selective vivid colour printing to bring the design to life, this coin is, without a doubt, going to be one of the most popular ways to own this BRAND NEW release.

Each coin also comes housed in a presentation case, along with a numbered Certificate of Authenticity, confirming its place in the strict edition limit of JUST 4,995!

To secure yours simply click here >>

Can I find the Alice Through the Looking-Glass 50p coins in my change?

If you’re living on the Isle of Man, then yes!

10,000 of each coin will be entering circulation on the Isle of Man, but when you compare that to the mintage figures for UK coins (our rarest 50p in circulation has a mintage of 210,000) you’ll realise just how few of these coins are actually out there.

Coins issued on the Isle of Man typically have lower mintage figures due to the smaller population of just 84,000 which means that their coins are particularly sought-after amongst collectors.

And, based on the popularity of the first Alice’s Adventures in Wonderland Set I’m sure that British Isles collectors will be super quick to snap these ones up!


Alice in Wonderland remains one of the world’s most famous and best-loved children’s tales, with fans spanning across generations.

So with a theme as strong as this, paired with those incredibly low mintage figures and the fact these are the FINAL coins available, I am under no doubt they will be a hit with collectors.

Will you be securing them for your collection? Let us know in the comments below!


Secure the 2021 Through the Looking-Glass 50p BU Set today!

Your Brilliant Uncirculated quality coins will come protectively housed in a bespoke presentation pack, carefully curated by the coins’ designer.

To secure the Alice’s Adventures in Wonderful 50p BU Set for your collection for JUST £31.25 (+p&p) click here >>

Rarest UK Coins Revealed! 2020 Mintage Figure Update

One of the biggest numismatic updates of the year comes when the latest mintage figures are announced and today we are very excited to share the updated figures for 2020 circulation coins, which have just been revealed by The Royal Mint!

As the UK’s most collected coin, it’s great to hear that three 50p designs were released into circulation last year. These include the Withdrawal from the European Union 50p, the Diversity Built Britain 50p and this year’s Royal Shield 50p.

We’ve updated the Change Checker 50p Mintage Chart with these new additions to show you which 50ps you should be looking out for:

The rarest of the trio to be released is the Withdrawal from the EU 50p, commonly known as the Brexit 50p, with a circulating mintage of 10,001,000. This is closely followed by the Diversity Built Britain 50p with a mintage of 10,300,000.

These numbers are fairly high for commemorative coins, meaning collectors stand a good chance of finding these ones in their change. What’s more, at 46,540,375 coins in circulation, we expect many collectors to be able to find the 2020 definitive Royal Shield design – just make sure you keep checking the dates on the reverse of your 50ps!

Are you lucky enough to have these in your collection? Let us know in the comments below!

2020 Withdrawal from the EU and 2020 Diversity Built Britain 50p coins

The Royal Mint’s Director of UK Currency, Mark Loveridge, said: “As the original maker of UK coins, we are delighted to play our part in celebrating the story of the nation. In 2020 two important new designs were issued on fifty pences, commemorating British diversity and the UK’s withdrawal from the European Union. Coin collecting remains a popular hobby in the UK, and finding a special design in your change adds to the excitement.”

What about the Olympic 50ps?

In 2012, the release of the Olympic 50p series kick started a collecting frenzy across the nation.

It’s estimated that around 75% of these coins have been removed from circulation by collectors which means they are incredibly sought-after, especially considering these 50ps have some of the lowest mintage figures in circulation…

Many of the Olympic 50ps have a mintage less than 2,000,000 with the rarest (the Olympic Football 50p) having a mintage of just 1,125,500. See the full mintage figures for these coins here.

2011 Olympic Football 50p. Mintage: 1,125,500

Taking these rare 50ps into consideration, the 2018 Peter Rabbit and Flopsy Bunny coins would sit in joint sixth position, below the Kew Gardens, Football, Wrestling, Judo and Triathlon 50ps.

£2 Coin Update

As well as updating the 50p mintage figures, The Royal Mint also revealed that no £2 coins were issued into circulation in 2020.

There have been no new £2 coins issued into circulation since 2016, which may in part be due to the introduction of the new 12-sided £1 coin in 2017.

2016 Britannia £2

It was recently confirmed that The Royal Mint has no plans to strike any £2 coins for circulation for the next 10 years, so unfortunately, there may not be any mintage updates for this denomination for a while.

Whilst 88,071,910 1p coins were released in 2020, no 2p coins have entered circulation since 2018, perhaps suggesting it’s time we question what the future has in store for our beloved coppers.


Have you been lucky enough to find any of these coins in your change? It’s always exciting when new mintage figures are revealed and your realise just how rare the change in your pocket really is!

We’ll be updating the Change Checker Scarcity Index this month and it will be exciting to see how these new figures impact the index.


If you’re interested in coin collecting, our Change Checker web app is completely free to use and allows users to:

– Find and identify the coins in their pocket
– Collect and track the coins they have
– Swap their spare coins with other Change Checkers

Change Checker Web App Banner 2 Amends 1024x233 1 1024x233 - Your January 2019 Scarcity Index update!

Sign up today at: www.changechecker.org/app