06:00Iain LeeJustin is in for Iain talking about riders cleaning up their horse manureBBC Three Counties Radio Duration: 3 hours Tue 15th Apr 2014, 06:00 on BBC Three Counties RadioSusan, a wheelchair user, from Woburn Sands is fed up of driving through manure and wants riders to clear up after their horses, like dog owners. Is that too much to ask?GenresEntertainmentBrandIain Lee Source: BBC Online