RETDI
I only take my information first hand from those who were in Westlands Yeovil, actually designing the Lynx in the mid 60's- including my father who worked on the conformal gearbox;
Where was Derek James?
The author Derek James states in the preface to his book:-
"The burden of responsibility for chronicling the history of this great company has been greatley eased by the willing assistance of many people, chief among them Harald Penrose, Fred Ballam and Peter Batten."
He goes on to say
" Fred Ballam cheerfully undertook the daunting task of reading and correcting the raw manuscript covering all the helicopter chapters, discovered long-forgotten project drawings and answered hundreds of questions, drawing on his lifetime service with Westland."
Fred Ballam MRAeS is, I understand, still with Westland and is responsible for the Archives he is also the Secretary for the Yeovil Branch of the Royal Aeronautical Society.
Derek James also acknowledges the help provided by a great number of present and past members of the Westland Team in the preface to his book.