Queen unveils plaque containing secret message - can you crack the code

The Queen unveiled a plaque containing a secret message to celebrate the 100th anniversary of GCHQ.

The UK’s intelligence agency has "saved countless lives" and "shortened wars" since it was launched in 1919, under the original name of the Government Code and Cypher School.

The Queen, who has been receiving information from the organisation for much of it’s existence, met with a number of senior figures at the agency’s former home near London’s King Cross.

During her visit she joked about how her father King George VI would become frustrated with his scrambler phone, modified by GCHQ to make his calls secret.

She also unveiled a plaque marking the anniversary, which contains a secret message.

Can you crack the code?

People have taken to social media to try and work out what it says.

Here’s a hint – look at the dots and dashes under some of the letters.

The letters with dots spell out ‘1 Hundred Years’, a nod to the special occasion.

During her visit she met Alex Younger, chief of the Secret Intelligence Service (MI6) and known as "C", and Andrew Parker, director general of MI5, the Secret Service.

Mr Fleming added: "It’s clear to us all that the world is changing at an unprecedented rate. It’s more interconnected than ever before.

"And this is driving extraordinary opportunity, innovation and progress. It’s also unleashing amazing complexity, uncertainty and risk.

"To keep up in this digital era – to optimise the potential of technologies like artificial intelligence and quantum computing – we know we need to keep reinventing."

During her visit to the nondescript office block near Charing Cross station, the Queen met Ruth Bourne, 92, a former Bletchley Park code breaker.

When the subject of scrambler phones – used to keep important conversations confidential – was mentioned, the Queen said: "I remember my father had one, he used to get so cross when it didn’t scramble.

"Took some time to heat up and then work."

The machines used valves, today replaced by transistors, which needed time to warm up before the equipment would work.