The ‘Useless’ British Tank That Couldn’t Aim Its Own Gun Unless It Drove Onto A Hill

North Africa 1941.

British 25p pounder crews are dying in the open desert.

Their guns are superb.

The Ordinance QF25 pounder can hurl an 11 12 kg high explosive shell over 13,400 yd.

It fires five rounds per minute.

It can kill a Panza 3 at close range with a solid shot.

But the gun has no armor, no engine, no tracks.

Every time RML’s Africa Corps punches through British lines, the gunners must hook their pieces to slow lorries and crawl to new positions under fire.

The gun needs to move and shoot.

Britain needs self-propelled artillery, and it needs it now.

What it gets instead is a vehicle so poorly designed that its own crews will have to drive it onto a hill just to aim its gun.

This is the Bishop, the self-propelled gun that cut one of the war’s finest weapons in half.

The problem was speed, not firepower, not accuracy, not reliability.

The 25p pounder towed behind a Morris C8 quad tractor could keep up with infantry advances, but not with armored thrusts across open ground.

When RML launched a counterattack, his tanks moved at 30 km/h across firm desert.

British artillery batteries needed 20 minutes to limber up, relocate, unlimber, and resume firing.

In that time, German armor could cover 10 km.

The towed gun was also completely exposed.

A near miss from a mortar round could kill the entire crew.

An air attack on the battery position could destroy guns, ammunition, and tractors in seconds.

What the Royal artillery needed was a gun that could drive itself into position, fire immediately, absorb some shrapnel, and drive away before counter battery fire arrived.

The Germans already had this concept working.

Their Vespie, mounting a 105 millimeter howitzer on a Panza 2 chassis, could elevate to 42 degrees and hit targets at 11,675 yards.

It moved at 40 kmh.

The Americans were building the M7 Priest, a 105 mm howitzer on a Sherman chassis that could reach 11,400 yd, carry 69 rounds, and cruise at the same speed.

Britain had nothing.

In June 1941, the War Office issued an urgent requirement.

The contract went to the Birmingham Railway Carriage and Wagon Company in Smithwick, a firm already producing Valentine infantry tanks on their factory floor.

The concept was straightforward.

Remove the Valentine’s turret, replace it with an armored box.

Put the 25p pounder inside.

The Valentine 2 chassis made practical sense.

It was already rolling off three separate production lines across Britain with Vicers Armstrong Metropolitan Camel and Birmingham Railway Carriage all building them simultaneously.

The Valentine was mechanically dependable.

Its AECA1 190 inline six-cylinder diesel engine was the only power plant in the Mediterranean theater rated as performing well in postwar assessments.

Two Valentines could be manufactured in the time it took to build a single Matilda 2.

But the Valentine was a compact infantry tank designed to carry a three-man crew at walking pace behind advancing soldiers.

It was never intended to house a field gun.

Birmingham Railway carriage had a prototype ready by August 1941, 2 months from contract to working vehicle.

That speed came at a cost.

The team built a tall flat topped slab-sided steel casemate directly on top of the hull.

The gunport at the front accepted the 25 pounder barrel.

The armored box measured 2.83 83 m tall, making the bishop nearly a full meter taller than the original Valentine tank.

Soldiers compared the angular profile to a bishop’s miter, the ceremonial headpiece worn by senior clergymen.

According to accounts from the 121st Field Regiment Royal Artillery, the nickname stuck immediately and launched the British tradition of naming self-propelled guns after religious figures, bishop, deacon, priest, sexon, abbot.

The whole ecclesiastical family started here.

The casemates’s armor was substantial, 40 mm on all faces with 22 mm on the roof.

The hull retained the Valentine’s own protection up to 60 mm on the front.

This made the Bishop the best protected self-propelled gun of the entire war.

Every competitor, the Westbay, the Hummel, the M7 priest, the Sexton used an open topped fighting compartment, but that protection created the bishop’s fatal flaw.

The steel ceiling of the casemate physically prevented the gun breach from dropping low enough for high angle fire.

On its towed carriage, the 25 pounder elevated to 45°, reaching 13,400 yd.

Inside the bishop’s armored box, the maximum elevation was 15°.

Maximum range dropped to approximately 6,400 yd.

The gun could traverse only 8° total, four left and four right.

The bishop had cut the 25 pounders reach by more than half and reduced its firing arc to a narrow slit, the ammunition situation compounded the problem.

Only 32 rounds of 25 pounder ammunition fit inside the casemate alongside three crew members, the gun mechanism, and the breach assembly.

In sustained fire missions, where a standard battery might expend hundreds of rounds, the Bishop ran dry in minutes.

The crew compartment was so cramped that the rear doors had to remain open during firing.

Because there was physically no space for the loader to work with the doors shut, some crew members operated from the engine deck behind the casemate.

The vehicle weighed 17.7 tons, but produced only 131 horsepower from its diesel engine, giving it a top road speed of just 24 kmh and an operational range of roughly 145 km.

The workaround became the Bishop’s most infamous characteristic.

To increase range, crews built earthn ramps and drove the entire vehicle backward onto them, tilting the machine to give the gun a few more degrees of effective elevation in the flat Libyan and Egyptian desert, where natural slopes were scarce.

Gunners sometimes spent hours digging and shaping ramps in blistering heat.

This negated the entire purpose of self-propelled artillery.

A gun that needs earthworks before it can reach its target is no more mobile than a towed piece in a prepared position.

The War Office found the design acceptable in November 1941 and ordered 100 units.

Production began at the Vicar’s factory at Ellswick in Newcastle upon Tine in early 1942.

80 vehicles were delivered by July of that year with a follow-on batch bringing total production to approximately 149.

An option for 200 additional units was cancelled once the M7 Priest became available through American Lend lease.

Now, before we get into combat, if you are finding this useful, a like on this video genuinely helps the channel.

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Now back to the desert.

The bishop entered combat at the second battle of Elmagne, which began on October 23, 1942.

Three Royal Artillery Regiments fielded the vehicle.

The 121st West Riding Field Regiment received 16 bishops in July 1942.

Attaching to the 23rd Armored Brigade to support Valentine tank operations.

Their batteries named individual vehicles in the British tradition.

One A troop machine was christened Lily Elsie after the Edwwardian actress.

Imperial War Museum film footage shows crews climbing aboard, elevating the gun, ramming home shells, and rolling out across the sand.

The 107th Field Regiment also deployed 16 bishops at Elamine with the same brigade.

By December 1942, the 121st had already traded their bishops for towed 25 pounders.

4 months in the desert was enough.

The 142nd Royal Devon Ymanry Field Regiment took bishops into Sicily in July 1943 and then into mainland Italy.

Imperial War Museum photographs from October 1943 show their vehicles firing at night from a captured German airfield near Grazines in southern Italy.

Parked among wrecked Gotha gliders, one vehicle bore the name Edmma II painted on its gunshield.

The regiment later earned a Canadian maple leaf decoration for supporting a Canadian division during the fighting around Monte Casino.

In combat, every design floor proved itself.

The 6,400yd range forced bishops within reach of German 88 mm guns.

Weapons that could destroy armored vehicles at distances the bishop could never return fire.

The tall silhouette made it an obvious target on flat terrain.

The 32 round ammunition supply ran dry in sustained engagements.

In Italy, bishops were sometimes loaded onto diamond tea tank transporters rather than driven between positions, suggesting that their slow speed and mechanical wear made road marches impractical.

The vehicle was still in service in Tunisia through March 1943 and in southern Italy as late as February 1944.

Against its competitors, the Bishop performed worst by every metric that mattered.

The German Vespe reached nearly double the range at 11,600 yd while weighing only 11 tons and moving at 40 kmh.

The American M7 Priest carried 69 rounds, nearly double the range, and cruised at 40 kmh on a proven Sherman chassis.

Britain first ordered 2500 priests in March 1942 before the bishop even saw combat.

The first 90 arrived by September and the priest fought alongside the bishop at El Laamagne that October.

Through late 1942 and 1943, priests progressively replaced bishops across the theater.

But the priest introduced its own problem.

Its 105 mm American ammunition was incompatible with every other British gun, maintaining a separate supply chain for one weapon.

Strained logistics across the entire 8th Army.

This drove the requirement for the Sexton, a Canadian-built self-propelled gun mounting the standard 25p pounder on a ram tank chassis derived from the American M3 Lee.

The Sexton restored the full 40° elevation and the complete 13,400y range.

It carried 105 rounds, more than three times the Bishop’s capacity.

Its Continental R975 engine produced 400 horsepower, triple the Bishop’s output, pushing it to 39 kmh.

The Sexton stood only 2.11 m tall, over 70 cm shorter than the Bishop.

Around 2,150 were built.

By D-Day, the Sexton was the standard British self-propelled gun.

Turkey received 48 bishops in 1943, accounting for roughly a third of total production.

The remainder were relegated to training duties in Britain, where they arguably performed their greatest service, teaching Royal Artillery regiments the fundamentals of self-propelled gunnery before those units transition to priests and sex.

No bishop survives today.

Every single vehicle was scrapped after the war, leaving only photographs, film reels, and regimental war diaries.

Military historians are nearly unanimous in their technical verdict.

According to the World War II database, as a design to meet an emergency, the Bishop served its purpose adequately at an important time of the war.

But its most useful function was as an instructional vehicle for teaching regiments the basics of self-propelled gun tactics.

That assessment captures the truth of the Bishop.

It was a failure as a weapon system and a success as a proof of concept.

In June 1941, Britain had zero self-propelled artillery in North Africa.

2 months later, Birmingham railway carriage had a working prototype.

14 months after that, bishops were firing at Elmagne.

The 25 pounder inside the steel box worked exactly as designed.

The vehicle around it was the compromise that urgency demanded.

Every floor the bishop exhibited, the restricted elevation, the cramped crew space, the towering profile, the inadequate traverse was deliberately avoided in the Sexton’s design.

The bishop taught Britain how to fight with mobile artillery.

Why ammunition commonality mattered and what never to build again.

149 vehicles dismissed as useless by the men who crewed them shaped every British self-propelled gun that followed.

The gun was never the problem.

The box around it was.

British engineering learned that lesson once, built the Sexton, and never repeated the mistake.