On October 21st the new London Axure Meetup group are having a meeting with a focus on prototyping for Windows Phone 8.
More details and registration at http://www.meetup.com/Axure-London-Meetup/events/138722292/
The group is organised by Sandra Sears (who some of you will know from past WPUG meetings and Windows Phone Parent) and she’ll be presenting.
If you’re interested in designing Windows Phone apps and prototyping tools then check out the meeting.