Midlets containing the central London tube map, and night and day bus maps can be downloaded here (see the attachments). They should work with any phone that supports MIDP 2.0 and CLDC 1.1 (i.e. most modern phones).

Installation

1. Download the appropriate .jar file. Don't use your phone to do this unless you have a data plan - they are rather large.
   
2. Copy it to your phone using bluetooth, a USB cable, or a memory card reader.
   
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, except for the tube map where it zooms and # takes you to the middle. The tube map is searchable - write the station name as if you were using predictive text. 0 for spaces.

Email me if you have any problems.