You may not have known this but the Microsoft Maps experience in the UK was totally different than in the US. The former was based on multiMap, a company Microsoft acquired in 2007. Here’s what the UK experience looks like with multiMap:
Here’s what a Bing Maps version of London looks like:
The Bing version is quite a bit cleaner and more pleasing in my view. Many of the Bing Maps capabilities, such as “Birds Eye” aerial imagery, had been available through multiMap prior to this however.
Now Bing Maps proper will be available in the UK. The Bing Community blog details the changes to the mapping interface and features, including new navigation and mapping layers that can be turned on or off. Many of these improvements parallel recent upgrades made in the US to the Bing Maps interface and features.