Since entering service, various upgrades have sought to improve the Challenger 2's protection, mobility and lethality, the most recent of which was the Life Extension Programme (LEP). In March 2021, the British Army announced plans to upgrade 148 Challenger 2s under the LEP with the aim to extend its service life out to at least 2035. These upgraded models will be known as Challenger 3. It is not planned to upgrade all Challenger 2s. Those not upgraded will be retired.[13]Supply challenger tanks ??
Vickers Defence Systems began to develop a successor to the Challenger 1 as a private venture in 1986. The Ministry of Defence ordered a prototype in December 1988. In June 1991, the MoD placed an order for 140 vehicles, with a further 268 ordered in 1994.