Kabz,
That was another of the ones that I worked on - in a ex-railway-carriage-shed in the South of England, before it went to be delivered to the RAF
Earlier, I worked on a "fighting vehicle" simulator where the visual was similar and the tank driver saw it thru the periscope. Great fun was had by all, putting spiders on the road just around the corner from where the "student" was driving
(later, when working for BA, I also did a training course with the "East of Canada" company
)