Hi Joss - good for you! Reading your post reminded me I want to read that book, so I ordered it too. I'll be interested to hear how you get along in the group too.
Just FYI, I'm also in the UK and just finished doing a Divorce Recovery Workshop, which was helpful and has a post-workshop social scene too. When I looked into doing this, I noticed they have a group in Wilmslow that organise workshops too. Just mentioning to you for possible future reference - though I hope your sitch doesn't go the way of mine, of course.
Take care my friend xx
T 13 M 7 Me 48 H 46 SS 15 BD 7.14 PA D final 5.16 (H filed)
We receive & we lose, and must try to achieve gratitude & embrace with whole hearts whatever of life that remains after the losses - Dubus