Sorry - 27 pages is rather a lot to read and the search facility doesn't appear to work - which page is it on?
However, I could be persuaded that the two photos of Cedric are a young, thinner, PM with false moustache and horn rimmed glasses. It is certainly his telescope.
Strangely there actually WAS a Cedric Allingham in the Tank Corps in 1944. Too much of a coincidence.