Google's free turn-by-turn voice guided navigation is available on Android phones. it supports Android 1.6 OS, too.

according to engadget, they tested it in UK already and made a few Pics about it.

source: engadget

"British Android device owners are waking up this morning to discover their robot-themed operating system has gone and upgraded itself overnight. We've confirmed for ourselves that Google Maps Navigation, the free turn-by-turn with voice directions, has made its fully functional way across the Atlantic. This is the 4.1.1 Beta released on April 6 to US customers, but as we say, it's now working over in Blighty as well.

We've tested it out on a Desire and Nexus One from HTC, with the latter offering the extra-cool option to aurally instruct your Google search bar to "navigate to" your destination.

We're now also sure the full Navigation service works on at least some Android 1.6 devices, such as the Dell Mini 5 and a reported Sony Ericsson X10 success"

if you want to see more pictures: look here.