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Newly-installed security barriers in the shadow of Edinburgh Castle which have been erected to prevent vehicles being driven into pedestrians by terrorists Stock Photo - Alamy
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Stirling Castle's dramatic history of coronations and murder inspired Game of Thrones gruesome scene - Derbyshire Live
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The Queen in security scare after two 'intruders' arrested at her Windsor estate - Cambridgeshire Live
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Queen advertises for Security officer at Holyroodhouse after Windsor Castle break-in scare | Daily Mail Online
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Engraving of the Edinburgh Castle on the Castle Rock, Edinburgh, Scotland, from the book 'Antiquities of Great Britain' by William Byrne and Thomas Hearne, 1825. Courtesy Internet Archive Stock Photo - Alamy
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State of the art security measures installed at Balmoral as Queen expected to arrive - Aberdeen Live
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