Bishop (artillery)

The Bishop, formal designation Ordnance QF 25-pdr on Carrier Valentine 25-pdr Mk 1, was a British self-propelled gun vehicle based on the Valentine tank and armed with the QF 25-pounder gun-howitzer, which could fire an HE shell or an armour-piercing shell. A result of a rushed attempt to create a self-propelled gun, the vehicle had numerous problems, was produced in limited numbers and was soon replaced by better designs. The rapid manoeuvre warfare practiced in the North African Campaign led to a requirement for a self-propelled artillery vehicle armed with the 25-pounder gun-howitzer. In June 1941, the development was entrusted to the Birmingham Railway Carriage and Wagon Company. A prototype was ready for trials by August and 100 were ordered by November 1941. The vehicle was based on the Valentine II hull, with the turret replaced by a fixed boxy superstructure with large rear doors. It was nicknamed the Bishop for its high mitre-like superstructure. The 25-pounder gun-howitzer was fitted in this superstructure. As a consequence of the gun mounting, the resulting vehicle had a very high silhouette, which is a disadvantage in desert warfare. The maximum elevation for the gun was limited to 15 degrees, reducing the range to , about half that of the same gun on a wheeled carriage. To increase range, crews would build large earthen ramps and run the Bishop onto them, tilting the vehicle back to increase the elevation. The maximum depression was 5 degrees, traverse was 8 degrees, and the vehicle could also carry a Bren light machine gun. By July 1942, 80 Bishops had been built; as the last 20 were being built, an order for a further 50 was placed, with an option for a further 200 but the tender was abandoned in favour of the American 105 mm Howitzer Motor Carriage M7. Turkey received 48 Bishops in 1943. The Bishop first saw action during the Second Battle of El Alamein in North Africa and remained in service during the early part of the Italian Campaign. Due to its limitations and the Valentine's characteristic slow speed, the Bishop was poorly received.