Operation Bletchley is an immersive virtual fundraising event organized by the Army Benevolent Fund (ABF), the British Army’s official charity. Participants embark on a month-long mission to walk 50 miles, solve 10 challenging codes, and deliver a secret message—all while supporting soldiers, veterans, and their families.
Join one of the UK’s most innovative events and prove your codebreaking skills!
July 2025, walk 50* miles, crack 10 fiendish codes, and deliver a secret message before time runs out!
From July 1st, embark on a thrilling adventure set in 1941 securing a new line of communication from Bletchley Park to The Cabinet War Rooms in London. You must deliver an encrypted message to Sir Winston Churchill on time – have you got what it takes to go undercover and complete your mission?
A 50 mile challenge to deliver an encrypted message before it’s too late…
Your mission is to cover 50* miles on foot, travelling from Bletchley Park to the Churchill War Rooms in London and crack the codes as you go. With brand new codes to crack for 2025, are you up for the challenge?
Register for just £15 per person
Register for £40 with no fundraising obligation.
London 1941
It’s 1941 and the United Kingdom is in terrible danger. Luftwaffe bombs are raining down on towns and cities across the nation. The Royal Air Force guards the skies and the Navy protects the seas, but the threat of invasion has never been higher. German spies could destroy our telephone network at any moment, so the Home Guard is tightening up security around the capital.
Your mission is to help us secure a new line of communication from Bletchley Park to the Cabinet War Rooms in London. We need you to walk the 50-mile route, making contact with key agents to solve puzzles along the way. Can you figure out the code and deliver the message before it’s too late?
Your Mission
It’s 1941 and the United Kingdom is in terrible danger. Luftwaffe bombs are raining down on towns and cities across the nation. The Royal Air Force guards the skies and the Navy protects the seas, but the threat of invasion has never been higher. German spies could destroy our telephone network at any moment, so the Home Guard is tightening up security around the capital.
Your mission is to help us secure a new line of communication from Bletchley Park to the Cabinet War Rooms in London. We need you to walk the 50-mile route, making contact with key agents to solve puzzles along the way. Can you figure out the code and deliver the message before it’s too late?
It is up to you how you would like to complete the walk, the challenge can be completed over a few days, or the whole month, but you need to reach the 50 miles and crack the codes before the 31st July. You can crack the codes as you go or save them up until the walk is complete. Once all the codes have been successfully decrypted you must decipher the final message and deliver it to Winston Churchill by midnight on 31st July.
How it Works
London is an event that you can take part in anywhere in the world. Here’s how it works…
*Also available is a £40 registration where you can opt out of fundraising.
Codes
Join this exciting challenge this summer and support soldiers, veterans, and their families.
You have one month to walk the miles, crack the codes, and deliver the final secret message.
The difference your generosity can make
Operation Bletchley was created to raise money to support soldiers, veterans and their families, through the Army Benevolent Fund. There is no obligation to fundraise, but we hope you’ll use your place to raise as much as possible:
The Army Benevolent Fund is the Army’s National Charity, here for soldiers, past and present, and their families for life.
