Debra - only worked the route out a couple of weeks ago - it's 7m along the Peddars Way, a horrible 2m of ankle deep sand along the North Norfolk Coast Path, then through a seaside town (stop for a coffee and a doughnut for refuelling
) then along the modern sea defences for a couple of miles, along an old sea wall for a few miles, then back inland through a forest, and then a road section back to the car. It's exactly 20m and I can see me using it a lot, only takes half hour to drive to, there's some slopes (can't call them hills around here!!!), a real mix of terrain...