Yeh, something that's a steady-ish gradient at 6-10% or so i guess. For a 4min+ ish effort. In retrospect, Highgate West was perfect really. But not schlepping all the way up there!
When i have loads of time and am fresh doing reps of both sides of Toys Hill is a win.
That's the one. I'm only 11 seconds behind @skinny on that one, a target for this year maybe!
College Road is okay, but the speed bumps, parked cars and pedestrian crossing make it hard to get a full effort out.
What kind of hill are you looking for? Something a bit more consistently steep than College Road but similar traffic levels?