After WW2 the troops were demobilised - most of them - given a 'demob suit' for use in seeking employment in 'civvy street' and set adrift.

Thanks, dxb. That’s interesting!

I’ve never heard the word “Pikey” either. What is its derivation?

Any company gathering that includes a sandwich lunch is almost certain to feed you prawn and mayonnaise sandwiches.

Well, I guess that sinks the “fish sandwich” possibility.