Apologies for my first post being somewhat controversial, but I don't find comments about "museums" very helpful. The railway is as much part of the scene as anything else and just doing whatever is needed practically and leaving it at that, no matter how it looks, is something that's produced too many depressing parts of the country. If a bit of effort can be made to make it fit in to its surroundings and / or look more attractive then that should be done. Sometimes that is achieved well with something modern, sometimes an older look is more appropriate, but it's about aesthetics and not "museums". A 21st century working railway shouldn't be one that simply does whatever it needs to work and doesn't care about anything else. It may be that sometimes the practical considerations have to win out because there's no feasible alternative or way they can be improved - first and foremost the thing needs to work, but please don't just stop at that point and dismiss anything else.