Bill, another good read is "No Time On Our Side by Roger Chapman"
https://www.jfdglobal.com/media/vgug0imd/rodger_chapman_picses_iii_case_study_.pdf
Again, one I have read years ago. Vickers/British Oceanics had a base at Leith Docks, my first time welding Titanium was a component part for Pisces V, and I'm sure I saw PIII during a trip to the Leith Base. The book is another ridiculously priced one on Amazon. Which got me thinking Bill, if you can source the ISBN number, see if your local library can source both these books from library resources, worth a shot?