Transport Direct is a comprehensive travel planning website. They are trialling a route planner for cyclists, it only covers a few areas (table below) at the moment. They are looking for feedback - so if you know any of the areas covered - give it a go.
http://www.transportdirect.info/web2/journeyplanning/findcycleinput.aspx
The current local authority areas for which data has been collected, collated and loaded into the cycle planner are:
Greater Manchester - 10 metropolitan boroughs: Wigan , Trafford , Tameside, Stockport, Salford City, Rochdale, Oldham, Manchester City, Bury, Bolton
Merseyside - 5 metropolitan boroughs: Knowsley, Liverpool City, St Helens, Sefton, Wirral
Derby - Derby City
Exeter - Exeter City
Lancaster - Lancaster City including Morecambe
Greater Leicester - Leicester City, Borough of Charnwood, Borough of Oadby & Wigston, Narborough, Groby
Greater Bristol - Bristol City, South Gloucestershire, North Somerset, Bath and North East Somerset
Peterborough - Peterborough City
Worcester - Worcester City
Oxford - Oxford City