I have just had an email from the EOR stating that they will be doing the Train Of Lights this year
Yes I have heard about that, it's like the MHR and NYMR, with more colour changing lights.
I did some research and after watching a bluebell railway 'steamlights' trailer from 2021, I found a company that provides 'light trains'. This is dated back to 2019, some of these I know do not run anymore, some I don't know about.
Norfolk Lights Express, NNR. Winter Lights Spectacular, NVR. Steam In Lights, SVR. Northern Lights Express, NYMR. I also know about some more that were not listed by this company in a video they did (again this video was dated back to 2019) so I also know about the EOR, Bluebell Railway, Great Central Railway and of course, DSR. Again, some may not be running.
I just found this amazing video by The Fenman showing ALL (I think) the Train of Lights in 2019.