Frith Hill Zig Zag

Starts from the Beaconsfield services, zig zag through Amersham and Great Missenden, up to Wendover and over the A41 to Tring. Either cruise down the A41 and off at Berkhamsted to the coffee stop if you want a quicker route, or dive off a junction early to Aldbury and down Toms Hill to Northchurch.