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Can You Crack The Secret Code On This Westminster Plaque?
A little-seen plaque about codebreakers hides its own code.
Walk to the end of the beer wine garden behind Gordon's, head up some steps, and you'll spot this curious green plaque.
The memorial, at 13-15 York Buildings, marks the first home of GCHQ, the intelligence service concerned with signals and codebreaking. The agency is considered so important that Queen Elizabeth II herself unveiled the plaque, to mark GCHQ's centenary in 2019.
