Hello CVFers!
Many thanks to S0updragon for the scanning efforts - now combined into a searchable PDF on the main site https://www.commervanfan.co.uk/assets/files/Commer%20Maintenance%20Handbook.pdf
Britstops is the one with the book, or Park4Night app for free but the latter is apparently meaning a lot of places are getting over subscribed (that and increased interest in 2020!)