I have saved the kml of uncompleted tiles from Veloviewer, converted it to a gpx using kml2gpx.com, sucked it into http://www.gpxeditor.co.uk/ and set the map type to OS resulting in:
Thanks, this works brilliantly although I had to trim my converted gpx file down as the huge number of tracks (833) in my gpx file was causing gpxeditor to slow down horrendously on my browser.
I used it to plan another 60km ride to fill in a load of tiles South of me although VV doesn't quite extend the kml file as far as I would have liked, but I can cope:-
(Yes, I know about the missed tile in Caterham itself, fixed that since doing the screen grab.)
I purposely ended the ride with a trip along the top of Farthing Downs as I inadvertently drove this way last year coming back from a party and the views looked amazing.
(Yes, I also realise I'm going back and forth across the ridge. 1074m climbing in 61km. It'll help me get slimmer.)
Anyway, that's enough rides planned to keep me occupied for at least a month or so. Very easy to create plans, bit tougher to actually get out on the bike and ride them.