Covenanter Mk I (Cruiser Mk V) – Original production model. Covenanter Mk I Close Support – Armed with 3-inch howitzer. Covenanter Mk II (Cruiser Mk V*) – Mark I production modified by addition of radiator-mounted oil cooler. Covenanter Mk II CS – Armed with 3-inch howitzer. Observation Post version existed with dummy gun, two No. 19 radios and a No. 18 radio; issued to artillery units. Command version existed with dummy gun and two No. 19 radios. Covenanter Mk III (Cruiser Mk V**) – new production with twin oil coolers installed either side of the engine. Clutch linkage modified. Air cleaners added inboard at the rear. Exhaust silencers moved to the ends of the track guards. Covenanter Mk III CS – Armed with 3-inch howitzer. Covenanter Mk IV – New production as the Mk II with the clutch changes of the Mk III. Covenanter Mk IV CS – Armed with 3-inch howitzer. Observation Post version existed with dummy gun, two No. 19 radios and No. 18 radio. Covenanter Bridgelayer – Covenanter hull fitted with a vehicle-launched bridge ("30 ft No. 1"). This was long and wide. It could span a gap and was capable of carrying 24 tons. In 1944, an improved bridge was developed with a 30-ton capacity. Covenanter ARV Mk I – Armoured recovery vehicle based on turretless Covenanter hull. One prototype was built in 1942. Additional equipment: Anti-Mine Roller Attachment (AMRA) Mk IC – a mine clearing device consisting of four heavy rollers suspended from a frame. The weight of the rollers could be increased by filling them with water or sand. Surviving vehicles A single Covenanter gun–tank is preserved at The Tank Museum, Bovington, in the United Kingdom. It is displayed in the markings it had during the War when it served with the 13th/18th Royal Hussars, part of the 9th Armoured Division. For unknown reasons, it was buried after the war on a farm near Dorking. In 1977 it was discovered, recovered, restored and put on display at the Bovington museum in 1985. The Tank Museum also has the turret from an early Covenanter pilot model. A second Covenanter tank was recovered in May 2017 from the same farm, now the site of Denbies vineyard. The partially buried, wrecked hulls of two other tanks may be seen at Titchwell Marsh in Norfolk, UK. Now a Royal Society for the Protection of Birds nature reserve, the