In England and Wales, some footpaths are much better for cycling on than bridleways, but currently it's only permissible to cycle on the latter. CTC believes that the Rights of Way network needs to be far more consistent, coherent and welcoming for cyclists.
Inconsistent rights of way: footpath left; bridleway right
Below are links to:
a 2006 presentation from David Moxon (former CTC Councillor), that illustrates the problem;
a paper, also from David Moxon, to the National Countryside Access Forum (NCAF) in 2004.