Jon Stone has, however, created a brilliant YouTube channel, called London Cycle Routes, to share good ways to travel between different areas using protected cycle lanes and quiet streets. It's well worth subscribing to. The emerging picture of the otherwise less qualitatively mapped network is very helpful as a basis for other journeys with which it may intersect.
Still, this is a world filled full of horrors as well as goodness!!!
One of them is that, although he thoughtfully makes GPX files available, Jon does not yet appear to be an AQ convert and so you have to sign up for a(n albeit free) 
Komoot account to download them!... YouTube, of course, doesn't provide file download facilities, so it possibly is the easiest way for him, given the time and trouble already involved in planning and filming the routes.Since I've already collected them, however, anyone interested may like to have the attached .ldk file for AlpineQuest, which contains all 70 routes recorded up to date. Yay!
Perhaps I could tag on a quick related question for François too... I may have missed something, but it isn't currently possible to import multiple GPX files directly into a specific pre-created .ldk file is it? You have to import each GPX as its own .gpx.ldk then cut and paste the track into the aggregate file and delete the now empty automatically created ones? If that's correct, could it be a feature request?
. In the meantime I make do with old qct files for checking OSM or load up Viewranger where I can still see my more current paid for OSGB tiles.
(Or, rather, just liable to give François a headache.)