I think the major problem with the guidelines is that they don't differentiate between someone who is just taking one or two photos between trains or of a train they are about to get on or off, usually being on the station no more than a "normal" passenger, and someone who hangs around for quite a while either photographing or just taking numbers. Oddly, on the times I've been hanging around stations taking photos, often down at the end of the platform, I've not once had problems, yet on the other hand all the times I've had problems have been when travelling and on stations for very short periods of time, in cases where I wouldn't have time to get permission. Actually, I've had more problem when travelling "normally" (rarther than in the cource of line or haulage "bashing", although sometimes to or from), and just taken an opertunistic photo of an interesting train (I nearly always take my camera with me when travelling by train), in which cases I've usually barely got time to get my camera out let alone get permission to photograph. On one occasion I almost missed a train (although this was only if I'd have taken up the persons offer to go to the station manager to "confirm" that photography was banned on that station, something I would have happily done had I not had an hour to wait for the next train which would have caused me to be late for an important interview. Interestingly, a later phone call to the TOC concerned confimed that no such rule existed, although irritatingly they did try to deny that the person worked for them [true, but he was under contract to them as a cleaner, and he did tell me he worked from them]).