For present day track plans you need to visit here: - http://www.pcs.planningportal.gov.uk/pcsportal/casesearch.asp
NOTE - Using anything but Internet Explorer and higher than version six and the grid references won't show.
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Dave
Or try NOMAD, Nottingham Online Maps And Data
Same maps as Planning Portal, but a larger window. Only for Nottingham and surrounding area, same comments re IE6 and grid refs apply... also a few bits of extra info are available, such as contour lines, spot heights and so on.