Marcantilian
I remember seeing an old photo of one of them. It had the incorrect spelling which could be seen under the new paint job, along with the numbers either '993' or '996'.
In the photo I saw, there was a set of aircraft boarding steps in the background with, I think, 'Reed Aviation' on the side.
I tried searching for it on the t'interweb yesterday but couldn't find many pictures of RAF Hercules C.mk.1's. for 1982-83 or before 1984 except the two-tone brown paint jobs.
It was in a magazine in late 1982/early 1983 when I was a schoolboy but it left a lasting impression on me.