I take this route to work: Peckham Rye – Rye Lane – Surrey Linear Canal Path (starts behind Peckham Library) - Burgess Park – Portland St/Brandon St – New Kent Road (only about 100m and on designated cycle path) – local streets behind E&C – Waterloo Rd – Waterloo Bridge – Covent Garden - British Library - Warren Street

Nice route; the only part with heavy traffic is around Waterloo