A midlet (mobile java application) containing the central London tube map, and night and day bus maps can be downloaded here. It should work with any phone that supports MIDP 2.0 and CLDC 1.1 (i.e. most modern phones). There is also a searchable Street Map of London available. It is awesome.

Standard Tube Map

Geographically Correct Tube Map

Tube Map (Including London Overground)

Bus Map

Night Bus Map

Installation

  1. Download the appropriate .jar file. Don't use your phone to do this unless you have a data plan.
  2. Copy it to your phone using bluetooth, a usb cable, or the memory card in your phone.
  3. Run it.

Usage

Simply run the midlet, and navigate the map using the up/down/left/right keys. You can also use the numbers. 5 takes you back to the middle of the map.