20mph limit. Can cyclists get done for this?

You're totally right about the first bit, but going down Tufnell Park Road, for example (in Islington, has very smooth gentle speed bumps) I normally do well over 20, I haz speedo so I know it's true.

1. most people on this forum have no idea of actual speed and think they are traveling much faster than they do, 20mph is a fair crack on the flat in traffic and pretty unlikely over islingtons speedhumps between sets of lights.