British Army’s next tank reaches seven test prototypes

Britain has now received seven Challenger 3 prototype tanks for trials, with an eighth in the final stages of build, as the British Army works to prove the design of its next main battle tank before full production begins, UK Defence Journal reported.

Defence minister Luke Pollard gave the figures in a written answer in Parliament to Conservative MP Ben Obese-Jecty, who had asked how many Challenger 3 tanks have been delivered so far.

“Seven Challenger 3 prototype vehicles have been delivered to date for use in the Demonstration Phase trials programme, with an eighth prototype vehicle in the final stages of build. These vehicles are being used to demonstrate and assure the performance and safety of the Challenger 3 capability in preparation for manufacture,” said Luke Pollard, the UK Minister of State for Defence.

The eight prototypes are meant to run firing, mobility, electromagnetic and safety trials in parallel during the demonstration phase, when the design has to prove itself before the Ministry of Defence commits to building the rest of the fleet. Trials have been taking place at Bovington and with the Armoured Trials and Development Unit, and a Challenger 3 fired its main gun for the first time in 2024, the same year Rheinmetall BAE Systems Land rolled out the first prototype at its plant in Telford.

The Challenger 3 keeps the hull of the existing Challenger 2 but adds a completely new turret, a 120 mm smoothbore L55A1 gun that fires standard NATO tank ammunition, modular armor, an active protection system to defeat incoming missiles and rockets, and a new sighting and fire control system. Rheinmetall BAE Systems Land is converting 148 tanks under the program, which will equip two armored regiments in the British Army’s 3rd (UK) Division.

The switch from a rifled gun to a smoothbore gun ends decades of British practice and was driven largely by ammunition supply. The Challenger 2’s rifled 120 mm gun fires rounds that no other NATO army uses, and the industrial base that produced them had shrunk to almost nothing, so moving to the same ammunition as allies such as Germany and the United States lets British tank crews draw on shared stockpiles in a long war.

The Ministry of Defence has tied the start of series production to the results of the trials rather than to a fixed date, with Pollard telling Parliament last year that manufacturing would begin once the tank’s performance has been validated, we reported in December. The British Army is still planning for an initial operating capability in 2027 and full operating capability by 2030, which leaves Rheinmetall BAE Systems Land about three years to convert the remaining 140 tanks once the design is cleared.

The 148-tank fleet will be considerably smaller than the force Britain fielded at the turn of the century, when the British Army operated nearly 400 Challenger 2 tanks, and the conversion program covers fewer than half that number, with the eighth prototype the last vehicle needed before the trials program can run at full strength.