Windsor Castle intruder stayed Army Barracks for the night, metres from The Queen

The Queen has been hit by a terrifying security breach which saw an impostor successfully con his way into the yards of Windsor Castle for the night.

An impostor was allowed into Army barracks by soldiers who protect the Queen in an astonishing security blunder — and then stayed the night.

Coldstream Guards near Windsor Castle were conned by a fake priest claiming to be a pal of the bases’s principal chaplain, known as a padre.

A Ministry of Defence probe is under way, The Sun reports.

Victoria Barracks, where the impostor spent the night, are just 400 metres from where The Queen lives. Picture: AFP.

Luckily, The Queen was not home at the time after spending the Easter break at Sandringham Castle. Picture: Getty Images.

Bafflingly, the intruder told officers he had trained as an ejector seat test pilot — and had received transplants of internal organs resistant to G-forces.

The impostor also bragged of having received a medal for bravery in the Iraq War.

Soldiers had allowed him in to Victoria Barracks — metres from Windsor Castle — without showing any ID or credentials.

He claimed to be a priest and a friend of the padre to the Coldstream Guards there.

A Ministry of Defence probe is underway into the incident. Picture: Getty Images.

The intruder spun more tall tales as he spent the night in the officers’ mess.

But while suspicions grew, he was still given a bed for the night.

Sources said the alarm was finally raised next morning after he had eaten breakfast.

Cops escorted him from the premises a couple of hours before the Queen — who had spent Easter at Sandringham — returned to Windsor.

This article originally appeared in The Sun and is reproduced here with permission