Film discovered today on a Youtube search - "Waterproofing Vehicles England 06 03 1944" - includes excellent images of (probably) 8 Beach Group (5 R Berks) (Beach Groups sign superimposed on the 3 Can Inf Div patch) and other troops. Also a shot of a very unusual Landing Craft Gun underway. American style this might be dated (in UK speak) 3 Jun 44. This link
might work as an alternative to a search:
https://www.bing.com/videos/search?q...A&&FORM=VRDGAR