I had his email address and wrote to him a couple of years ago, the email bounced back as 'undelivered' after some time, as he was not a young chap I presumed that he was sadly no longer with us.
I have to say, I wondered about him too. I enjoyed reading his accounts of building locos . Especially the one about the K's mogul. Never found out if he finished it.
Well if anyone knows if he is still around , maybe they can let us know.