You can get London streetmap for the cell phone for free.
It runs on all handheld mobile devices running java (MIDP 2.0, CLDC 1.0).
It is possible to zoom and panorate in the streetmap.
The London streetmap image is found on the internet and is belived to be free.

User manual tip:
Press the select button to display the menu.
Press the number "1" button for zoom out.
Press the number "3" button for zoom in.
Use the navigate buttons up,down,left and right to panorate on the street map.

A bigger streetmap over central London can be found on jtrustn.webhop.net

The following street maps can be found on my webpage:

Newcastle on tyne (UK)
Borgerhout (part of Antwerp, Belgium)
Oxford (UK)
Vienna (Austria)
Brussels (Belgium)
Birmingham (UK)
Athens (Greece)
Paris (France) Metro map
Sofia (Bulgaria)

More StreetMaps can be produced on request.
Drop me a line about what city or area you want and a link to the public map image on the internet.
E-Mail address can be found on jtrustn.webhop.net