http://media.getjar.com/repository/img/16514.jpg

This is a searchable street map of London. Image data is from streetmap.co.uk. Street index is from openstreetmap.org. Currently the street searching can get the location slightly wrong due to map projections and stuff. There are some other minor bugs, but it is very usable and useful. You need to actually get the jar from http://tdhutt.googlepages.com/mobilelondonstreetmap#gjw as the one on getjar is just a dummy file.
As a bonus, there are bus and tube mapshttp://tdhutt.googlepages.com/#gjw

sorry i didnt understand how to install.

the detail in both this address included in the explanatory

This is complete garbage. When you try to install it is asks for an activation key and when you try to obtain the key, it returns "Web - no gateway reply"

Waste of time!

Thanks for the bus and tube maps links anyway :)

ok here is a guide you may find easier

Installation

1)Download Map.jar to any location on your phone.
2)Download london.dat and london_idx.dat to the root directory of your memory card.This is important, otherwise it won't work.

3)Run the program. Allow it to access the london.dat and london_idx.dat files.

u can find everything you need here for london map + bus and all available tubes here

http://rapidshare.com/files/128923999/London_tube_map__tube_and_bus.zip

"Web - no gateway reply"