Over at the website of the Science and Society Picture Library, they have a couple of screens of thumbnails (you can click on the thumbnail to see a larger version) of some British railway heraldry. It's an interesting assortment of coats of arms and pseudo-heraldry, and well worth a few minutes of your time if you have any interest in either heraldry or railroads.
http://www.ssplprints.com/category/875/transport/rail-transport/railway-heraldry/coats-of-arms and a separate page (with only two examples) of "crests" (which are really coats of arms!) at http://www.ssplprints.com/category/1059/transport/rail-transport/railway-heraldry/crests
3 days ago