Royal mail spokesman Andrew Hammond said: "This stamp issue illustrates the development of Buckingham Palace from the private house built by the Duke of Buckingham 300 years ago to one of the most iconic buildings in the world."
He added: "Buckingham Palace is one of the most recognised landmarks in the UK and is a source of pride to the nation; it forms a huge part of our heritage, so it's fitting Royal Mail has been able to dedicate a stamp issue to this most famous of addresses."
More top news
Paramedics were on standby outside the police cordon as armed officers stood by the property.
A team of researchers has taken samples from the ten busiest London Underground lines to work out which are the dirtiest.
The action comes on top of an emergency timetable which has seen hundreds of trains a day being axed.