@Baltus
I am no Cyclist as I have skinny chicken legs, but in theory it would be possible to do this with MyRoute-App Mobile which is free.
You would not get turn by turn notifications but a route-track to visually follow.
In the screenshot below I have presumed that Purple is a Cycle Route on Wimbledon Common. (I may be wrong but it makes no difference, as you will know the Legend for cycles routes.)
Create the Waypoints on the OpenCycleMap Overlay.

Then save the file to your Computer/Mobile as gpx 1.0 (route, track, POI).
Then import the gpx file as a route-track.

Then open the route on your mobile phone in the new MyRoute-App Mobile.
