Chevrolet-Scammell & Ford-Scammell FATs

[David_Hayward (RIP)]

I am just writing a very precised item about these and have had the advantage in recent times of reading about the Bedford-Scammell and Dennis-Scammell one-offs that used the identical Scammel bogies and Morris-Commercial bodies as fitted to the CDSW FATs. The British counterparts were never proceeded-with as they weighed 17 cwt and 10 cwt (over 3/4 ton and 1/2ton) more than the standard 4x2 chassis they were converted from. Can anyone add anything about the DND's versions after the Petawawa trials in 1938? Which unit[s] had them allocated post-1938?