In reply to Chris Aston:
All I know is it's in progress. Here's a quote from last year:
"... nearly all the text and information for the next definitive Lancs guidebook is ready. This means that the only potential holdup now is obtaining photodiagrams for the Bolton Area. Unfortunately, before the photos are taken, some of the crags need a clean up and whilst this has been done elsewhere, there are some of the Bolton crags where this is urgently required."
So getting there. But not there yet.