Sounds like a CX to me. Starts off on the A3 from Putney Hill going down to Wandsworth, over the bridge, right into Townmead, dodge the barrier into Chelsea wharf (oh yes! Many times), and works his way to 'U' turning on Cromwell Rd, up to Launceston Pl. where he seems to stop. It always looks faster than it actually is when you watch videos, though he's clearly pushing it a bit. You get on a roll when things go well, quite a buzz. Memories eh? PS: I did something similar going the other way on a 400/4 when I first started in '76. Hacked through Wandsworth, up West Hill and down past Tippet's on the A3 when another bike pulls alongside. It's a copper, and he stops me at the entrance to Putney Vale Cemetery. "That's a nice pair of mirrors you've got on your motorcycle" says he, "It's a pity you don't use them". He'd tagged me all the way up West Hill, but was prepared to listen to my story. Seems he was quite impressed by the fact that whilst I had been doing 50 in a thirty, I'd slowed at every junction - and was his reason for letting me off - with a warning of course! I watched my mirrors a bit more after that.