Aside from the cost, the thing which has put me off hiring a freelance editor for my self-published books has been the difficulty of finding someone suitable. Is there a thread for editors similar to the Bewares and Background Checks for publishers/agents etc?

In particular, I've been looking at The Book Specialist, aka Charlie Wilson. She's in the UK, as am I, and edits in my genre, i.e. romance. But other than that, I've no idea if she's any good. I'd love to find somewhere I could ask people for personal recommendations for editors and get warnings about editors to avoid. I'm mostly looking for developmental/content editing, rather than copy editing or proofreading.

Does anyone have suggestions? And maybe we could have a thread for this somewhere? Or someone could point out the one that already exists which I couldn't find?!