Windows Phone 7 is expected to be available starting October in the UK. While Orange was announced as a launch partner, the list of operators has now grown to include:
With the international availability of the Zune services announced a few days back and the operators list being expanded, the launch is near and should be a big one.
Update: These five are the only operators in the UK, the headline has been edited to reflect the same. (Thanks @TomWarren!)