Normally not part of the tourist visits, this summer the garden at Buckingham Palace will be opened to the public for the first time, and they’re allowing picnics on the lawn.
About the Buckingham PalaceThe official residence of the British Monarchy.
The Changing of the Guard takes place several times a week at 11am (typically Mondays, Wednesdays, Fridays and Sundays).
During the summer months, when The Queen is not in residence, the main staterooms are open to the public to visit.
Link to Buckingham Palace's website
Buckingham Palace Road,
Buckingham Palace Map
Fequently asked questions
The nearest station is London Victoria which is 0.3 miles away.