It's been a while but, after discussions with a Publisher who Shall Not Be Named, there were some requested re-writes, changing some aspects of the Witherstone books to locate the story specifically in Lancashire mainly, but not changing the story itself to any significant extent. This took several months, fitting in around work, life, the universe, and everything, but were eventually completed.... only for the publisher to halt publishing proceedings several months later due to circumstances outside their control.
After a loooong wait, no light is appearing at the end of the tunnel, and a few readers have asked to be able to read the revised tale, so I'm looking into re-publishing the Witherstone books as a complete trilogy via Createspace. Will keep you posted!