https://www.armyrecognition.com/archives/archives-land-defense/land-defense-2021/rbsl-completes-systems-integration-readiness-review-for-challenger-3-mbt
In a tweet posted on December 13, Rheinmetall BAE Systems Land (RBSL) announced it has completed another Challenger 3 MBT programme milestone: the Systems
systems integrationreadiness reviewrbslcompleteschallenger