The good olde Beeb have posted this morning that the NRM are to digitise the Eric Treacy photographic collection https://www.bbc.co.uk/news/uk-england-y ... e-51387764
They do state that locations were rarely recorded but below is one they posted of 60081 Shotover at Leeds, post 1958, a lovely shot in the pouring rain, not my area, but perhaps could give somebody some semaphore and electric signal detail.