Mr.Pegler is not my favourite "expert" by a long way. The book being pushed in the film is about OK, but his subsequent books, particularly the one on sniping in WWI, are full of mistakes, not something one expects from someone who was senior curator of firearms at the Royal Armouries Museum! It smacks very much of the "can you give me 50,000 words by Wednesday" type of publishing.

Regards
TonyE