Street names...

Nice enough, but two major problems:
1. Hundreds of streets are just not named.
2. The river, the very object of orientation, is not blue. This is unusual, to say the least.
On the plus side, there is a nice feature with the tube: Hit a button, and all tube lines appear ON THE STREET MAP. No stop names, but nice yet.

thedetective about London - Offline Maps & city guide (w/ metro!), v3.92