Convicted murderer admits trespassing into grounds of Buckingham Palace

A man with a conviction for murder pleaded guilty to trespass on Friday after scaling a perimeter wall of Queen Elizabeth's Buckingham Palace and then asking if the monarch was at home, the BBC reported.

Dennis Hennessy, 41, climbed over the wall surrounding the queen's home in central London on Wednesday night and walked for about 10 minutes around the grounds of the palace where 90-year-old Elizabeth and her husband Prince Philip were staying.

In an interview with police, he said he had walked through the garden to enjoy the view.

Hennessy, who was convicted of murdering a homeless man in 1992, admitted one count of trespass on a protected site and one count of criminal damage and was jailed for four months, the BBC said.

The incident occurred hours after the queen had returned to the palace having earlier carried out the State Opening of Parliament.

"I am content that our security measures worked effectively on this occasion and at no time was any individual at risk," Commander Adrian Usher, head of London police's Royalty and Specialist Protection unit, said.

A spokesman for the queen said the palace did not comment on security issues.

There have been a number of security breaches at the palace over the years. In October 2013 a man armed with a knife tried to enter the palace through one of its gates and was later jailed for 16 months.

That took place just a month after two men were arrested following a break-in at the palace in one of the most serious security breaches there for about 30 years.

One of the biggest security breaches at Buckingham Palace happened in 1982 when an intruder, Michael Fagan, climbed a wall and wandered into a room where the queen was in bed.