Personally, I've never found it's that simple. Some stations I've heard a lot of bad things about, yet have never had problems even though I've taken photos in full view of staff (liverpool st and victoria), wheras other stations I've heard people say are fine, yet I've had problems or know others who have. It's possible to get trouble on a quiet rural station if someone sees you and for whatever reason doesn't think you should be photographing. It tends to be individual staff that are the problem, rarther than station policy. Oviously, if it is policy, then a list would be good, but we need to be careful not to mix one badly informed or just plain anti-enthusiast staff member with it being station policy. Really, I'd say all London stations, in particular those operated by NR, are in the "Staff prefer if you have a pass" list, but it depends on individual staff if they will turn a blind eye or if they will give you trouble.