Brilliant charity supported by Sport Relief operating from Alton Water takes people out every Friday .
How to volunteer http://www.do-it.org.uk/search/opportunities/1795832/Bike_Active_Volunteer_Cyclists .
There is a map here http://www.facebook.com/pages/Bike-Active-Alton-Water/155024427956677?sk=info
and a news clip on youtube here http://www.youtube.com/watch?v=bZ7bMKWzbxg
Kevin
Update 26 October 2015: Bike Active now have a website: http://www.bikeactive.org.uk