Can you crack GCHQ's secret code? Intelligence agency releases puzzle to challenge potential spies

There was a time when recruitment involved a whispered word on a park bench from a man in a macintosh.

But now GCHQ has become the first British intelligence agency to advertise for spies on LinkedIn.

The security and cyber centre plans to offer careers using the social media platform. To give a taste of what it's like to work for His Majesty's Secret Service, experts released a visual puzzle today to challenge potential applicants. 

Hidden within this montage are 13 elements that represent letters of the alphabet.

The test is to identify those letters and assemble them to reveal a secret message. Director Anne Keast-Butler said: 'The world is getting more complex and we're only going to stay ahead of those threats by bringing together the right mix of minds to tackle challenges ahead.

Experts released a visual puzzle today to challenge potential applicants to GCHQ

Experts released a visual puzzle today to challenge potential applicants to GCHQ

The GCHQ building in Cheltenham. The security and cyber centre plans to offer careers using LinkedIn

The GCHQ building in Cheltenham. The security and cyber centre plans to offer careers using LinkedIn

'For us, that means bringing in people with different backgrounds, different experience, different insights, different knowledge, and creating a team where all of us can play our part.

'We're on a journey to make sure that we reach out and connect to people who have never thought of working with us.'

Ms Keast-Butler added: 'As part of launching on LinkedIn, we are in true GCHQ style – and to try to help you think out of the box – launching a puzzle. See if you can identify the letters.'

The answer is in tomorrow's Daily Mail.