I am taking part in a 100K event later this year, and the organizers have made available a .kml file of the route downloadable from here. This is great, but I want to view this route on a UK 1:25000 Ordnance Survey (OS) map, the kind that Bing Maps presents, when you choose Ordnance Survey as your display option. As is, I can only view the route in Google Maps which lacks much of the information than an OS map provides.
I can compare Google Maps displaying the .kml route side-by-side with Bing Maps displaying the OS map, but is there a way of pulling the .kml file into Bing Maps? Or is this functionality available elsewhere?