If all these snipes are aimed at me, my original question was just a trivia question out of curiosity (not a complaint or criticism, but some seem to have taken it as such), as I had not seen that lamp style in use in previous years' main line runs - that was all. Thanks for the various information.
Not aiming any snipes anywhere. If you aren’t in the Beeching Posting group on Facebook you have missed out on an hilarious weekend of train/lamp fun.
I genuinely like providing information, and I have too much other stuff going on to argue with people on the internet (unless they are flat earthers or antivaxxers etc).
My responses might be quite short, but that’s just me normally!