Question to the Ministry of Defence:

To ask the Secretary of State for Defence, what estimate his Department has made of the volume of carbon dioxide emissions produced by the ceremonial activities associated with Trooping the Colour; and what steps his Department is taking to mitigate the environmental impact of state ceremonial events.

The Ministry of Defence does not record the volume of carbon dioxide emissions for individual events. However, the Department is committed to reducing carbon emissions and operate sustainably where practical with no compromise to national security.

The troops involved in Trooping the Colour marched from barracks in the immediate vicinity of the parade.

For the aircraft participating in the King's Birthday Flypast the RAF continues to lead the way in operating more sustainably as part of Defence's commitment to reduce carbon emissions. For this flypast, jets from the Royal Air Force Aerobatic Team were powered with a high-ratio blend of sustainable aviation fuel (SAF). This is thought to be the first time anywhere in the world that a national aerobatic squadron has switched to both a SAF blend for propulsion and a renewable biofuel, known as Hydrotreated Vegetable Oil to produce its trademark vapour trails.