I don’t think that I can better any of the published photos. My time with RAE was post NAD, but I did manage to exercise the raised catapult on several occasions.
Sam Kidd was associated with building many things, but I suspect that due to the complexity of the rolling platform it was contracted out – as was the ski jump.
HMS Kidd might be what I knew as HMS Bedford which was constructed in Sam Kidd tradition to replicate a carrier deck and conning tower with full night lighting for Harrier trials. It was impressively real when all of the other airfield lights were off. IIRC this was aligned with the arrestor runway on the N side.