The regiments of the Royal Horse Artillery (RHA), dating from 1793, are part of the Royal Regiment of Artillery (commonly termed Royal Artillery) of the British Army. Horses are still in service for ceremonial purposes but were phased out from operational deployment during the 1930s.

There are currently four separate regiments that wear the cypher (cap badge) of the RHA:

·         King's Troop, Royal Horse Artillery is primarily a ceremonial unit and uses vintage 13-pounder guns for firing salutes. However, it also has an operational role as part of the territorial defence of the United Kingdom.

·         1st Regiment Royal Horse Artillery

·         3rd Regiment Royal Horse Artillery (The Liverpool and Manchester Gunners)