For the mushroom man...
....DCS could have stood for Distinguished Conduct Service, but ACTUALLY stood for Dairy Cream Sponge. This was one of those frozen desserts issued by in-flight ration store which was incredibly popular with MPA crews.
"Allto cockulus in" MR1 was was fitted with but very rarely used. An abstruse bit of kit hung over from the '50s. The clue being in the name given to it as Autolycus was described as "a picker-up of unconsidered trifles". Ah the benefits of a classical education.
The Ancient Mariner