As with many sheds the turntable was a vital part of the set up, engines would usually come on shed be turned, coaled and watered before moving to their allocated shed road prior to their next duty. Depending on the size of shed sometimes physically operating the turntable would have been the responsibility of the loco crew, or as in the case of Salisbury there was a dedicated gang of shed staff allocated to the role.
I have on Fisherton Sarum modelled the turners operating the turntable, although these operators are either static or moving so quickly they only appear as a static blur (delete which ever version you don’t actually believe). The turntable itself, is as detailed in my view from line #6 post that can be read here, made from a Peco LK-55 well and deck with scratchbuilt sides, winding mechanism and turners platform for the turners.
I have also modelled the turners gang mess hut that was provided for them to keep warm, dry and rest between turns. At sheds like Salibury the turntable gang was often formed of staff that had previously been in other roles but ended up in such a gang due to a number of reasons such as medical or eyesight issues. Keeping a job being better than no job. I have made use of a Wills SS50 Platelayers hut kit but with the roof replaced with slate tiles rather than the supplied corrugated iron sheeting to more closely represent the one at Salisbury. Stored outside and around the turners mess hut are barrels of lubricating and steam oil.
Signs on the approach roads to the turntable warn drivers not to pass that point unless given instruction to do so by the turners. These were simply made from a short section of rail with a plasticard board and then suitably painted.
The turntable itself on Fisherton Sarum is very much one of the main focal points of the layout and as stated above it has been described in more detail in my View from the Line #6 post here.