I was interested to follow up a little on the British Pathé article, which of course led to 'War Lover' as has been reported on in this thread several times.
This link gives some more background on that, relevant to Bovingdon, and John Crewdson, I don't think it's been referenced previously...?
Also, while it may be peripheral to this story, I found this video with Gilliam Aldam very interesting (Gillian being John Crewdson's partner):