A man was arrested today after trying to enter Buckingham Palace while in possession of a knife, Scotland Yard said.
The 44 year old was held at around 11.30am when he attempted to get through the north centre gate and was stopped by police. Officers searched him and he was found to have a knife.
He was arrested on suspicion of trespassing on a protected site and possession of an offensive weapon and is in custody.
Buckingham Palace said that the Queen was not in the building when the man tried to get in, but would make no further comment.
Prince William watched the first 20 minutes of the match today. There was also friendly banter between some of the supporters and the referee Howard Webb, with one spectator shouting at the official, who has a shaved head:
"Get the hair out of your eyes, ref."
At half-time, Polytechnic were leading 1-0.
England's two oldest amateur football clubs are busy warming up ahead of the first ever football match at Buckingham Palace.
Civil Service FC and Polytechnic FC, both based in Chiswick West London, are due to play a competitive Southern Amateur League fixture this afternoon.
Wembley groundsmen were tasked with preparing the lawn of the famous landmark for the occasion.
Prince William has joked that anyone who smashes a window during the upcoming football match at Buckingham Palace will have to answer to his grandmother.
The famous landmark will host its first ever football match between two of England's oldest amateur clubs later today, as part of the Football Association's 150th anniversary celebrations.
The Duke of Cambridge paid tribute to football's unsung heroes by honouring 150 grassroots volunteers ahead of an historic match in Buckingham Palace's garden today.
Civil Service FC and Polytechnic FC, both based in Chiswick, will play a Southern Amateur League fixture in the gardens of the famous landmark - the first time a competitive match has been held at the Palace.
At its best, football is a powerful force for good in society. It binds people from different backgrounds, communities, faiths and abilities - and gives them a common interest, a unifying identity.
I believe over its 150 years, football has remained a wonderful example of the power of community and of our ability to come together to organise and to enjoy a simple pastime.
In a speech ahead of the first football match at Buckingham Palace, Prince William has said:
I cannot tell you how excited I am that later today we will be playing football on my grandmother’s lawn.
One warning, though: if anyone breaks a window, you can answer to her.
As the president of the FA, William has helped organise the match as part of the Football Association's 150th anniversary celebrations.