Forthcoming steam weekends (2023): 08-09 July 2023; 10 September 2023; 07-08 October 2023 Opening hours at other times: from 08 April 2023 to 21 October 2023 every saturday from 10 am to 5 pm. Further information is available here.
These pictures show the inner workings of the signal at first floor level. Here there are various levers to be found which earlier controlled points and signals, as indeed some still do today.