Also in Tidworth? The Royal Tank Regiment who operate Challenger 2 tanks. It appears the user who posted the classified image is in the British Army - as the UK Defence Journal points out, Pyrophoric lists their location as Tidworth, a garrison town in south-east Wiltshire, England.
The trunnions support the rotor in the turret structure and the GCE sub components as previously stated are all mounted to the rotor.' The trunnion's sit centrally of the rotor. The image isn't exactly to scale as its only meant to show the position of components relative to each other but it works for the point I'm trying to make here. 'Linking those screenshots with the following edited image from the AESP's which is meant to show the relationship of the various components. Here's what the player posted alongside the document and two screenshots of the tank in War Thunder: Various parts were reportedly fully blacked out. According to a post by the UK Defence Journal, the image had its 'UK Restricted' label crossed out, with an 'UNCLASSIFIED' stamp added.