Thank you to previous holder Jonathan Burnhams for his messages. This FKT route is a fantastic way to experience some of London's best parks. Navigation is not easy. Make sure that you take the first bridge inside of Paddington Station and Hampstead Heath and Highgate were tricky even with the LDWA gpx. Several places were shut - worst of these was the entrance to Finsbury Park and the route taken (if you are looking at Strava) is a good half a mile out of your way. We took an unnecessary scenic route around Regents Park rose gardens.
Finish at View Tube is great place for food/drink.