Appears Liz is getting a bit lackadaisical in her security of late. Not for the first time she's had intruders...
...one actually in her boudoir. 
http://www.independent.co.uk/news/uk/home-news/buckingham-palace-intruder-dennis-hennessy-man-who-br...
When apprehended, the miscreant kept repeating, "Is Ma'am in" ? 

"One was NOT amused".