A former head of the armed forces was thrown off his horse after the Trooping the Colour ceremony on Saturday.
Field Marshal Lord Guthrie of Craigiebank was “receiving medical attention” following the incident, the Ministry of Defence said.
The 79-year-old could be seen lying on the ground and surrounded by police officers after the fall which took place near the Victoria Memorial in front of Buckingham Palace.
Pictures showed Lord Guthrie on the ground, as officers rushed to his aid while another officer led his horse away.
Former SAS commander Lord Guthrie was head of the British Army until 1997 and then chief of defence staff until 2001.
RAF veteran John Nichol tweeted on Saturday that he hoped Lord Guthrie was not seriously hurt.