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Just after 7.15am, on the morning of July 9, 1982, Queen Elizabeth II was woken by a disturbance behind her curtain.
There was a man in her bedroom with blood all over his hands.
In a nightie that reached just below her knees, the Queen, who was 56 years old at the time, is reported as asking: "What are you doing here?"
The man who stood before her, 33-year-old Michael Fagan, remained silent.
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What the Queen did not know, is that this was the second time Michael Fagan had been inside the palace. A month prior, a housemaid had caught out of the corner of her eye a man climbing up a drainpipe. By the time she called security and they arrived, the man had disappeared, leading most to dismiss her account altogether.