College Road is private, but open to traffic who pay a toll. Cyclists are exempt though. The toll means it's relatively quiet.
My route would be that, then through Dulwich, then either up Sunray Avenue, or use the bike path that runs up Green Dale, then through Camberwell and up Walworth Road to E&C, then Blackfriars. There's traffic but most of that route from Denmark Hill has bus lanes, so it's never too bad.
Walworth Road is full of traffic and therefore horrifically polluted, E&C is possibly the worst junction in South London. Head up Greendale and then pretty much follow the Q7 quietway. I now no longer cough at my desk every morning taking this route!
College Road is private, but open to traffic who pay a toll. Cyclists are exempt though. The toll means it's relatively quiet.
My route would be that, then through Dulwich, then either up Sunray Avenue, or use the bike path that runs up Green Dale, then through Camberwell and up Walworth Road to E&C, then Blackfriars. There's traffic but most of that route from Denmark Hill has bus lanes, so it's never too bad.