<P> On 14 May 1941, the Home Guard provided the King's Guard, in recognition of the first anniversary of its foundation . This was repeated in May 1943 . </P> <P> There are two detachments of the Queen's Guard in London, one each for Buckingham Palace and St James's Palace, under the command of the Captain of The Queen's Guard . Because St James's Palace is still the official residence of the Court, it is here that the Colour is lodged and the Captain of the Guard establishes his headquarters . </P> <P> The Queen's Guard in London changes in the Forecourt of Buckingham Palace at 11: 30 am every day in the summer and every other day in the winter . </P> <P> The St James' Palace detachment of the Queen's Guard, led usually by the Corps of Drums, and bearing the Colour (if the Queen is in residence, then this will be the Queen's Colour; if she is not, then it is the Regimental Colour), marches along the Mall to Buckingham Palace, where the Buckingham Palace detachment has formed up to await their arrival . These two detachments are the Old Guard . Meanwhile, the New Guard is forming up and are awaiting inspection by the Adjutant on the parade square at Wellington Barracks . The Band, having been inspected by the Adjutant, forms a circle to play music whilst the New Guard is inspected . The Guard provides a full Military Band consisting of no fewer than 35 musicians (usually, though not always, from one of the Guards regiments) accompanied by their Director of Music . When the New Guard is formed up, led by the Band, it marches across into the forecourt of Buckingham Palace . Once there, the New Guard advances towards the Old Guard in slow time and halts . The Old Guard presents arms, followed by the New Guard presenting arms . The Captains of the Guards march towards each other for the handing over of the Palace keys . The new reliefs are marched to the guardrooms of Buckingham Palace and St James' Palace where new sentries are posted . </P>

When do they change guards at buckingham palace