Another post by me following from Wim's post of
this site which shows amphibious tests etc in 1943. On the 3rd page, second down on left hand column is a clip showing (~I think) Chespale Trackway and on the same page, third down left and right are two clips showing the manufacture of "Hessian Wire Mat"
There's also some clips showing RE & RAF plant (scrapers/Graders Etc.) practising entry & exit from landing craft.