Seventy-one horses of the King's Troop, Royal Horse Artillery have marked the 96th birthday of the Duke of Edinburgh.
The unit's horse and gun carriages road past Buckingham Palace, and into Green Park to perform a 41-gun salute.
Six First World War field guns fired blank artillery rounds ten seconds apart in honour of Prince Philip.
Hundreds gathered in central London to watch the event, while the Duke spent the day privately at Windsor Castle.
Next weekend, Philip is expected to help Her Majesty the Queen celebrate her official 91st birthday at the annual Trooping The Colour parade.