…. Our BR▸ (British Rail(ways)) weekly pay packets were made up with £1 notes during the time the offer was running, who remembers being paid weekly cash in hand and £1 notes?
Brown envelope 3 by 4 inches, with top corner missing so notes ( incl. £1 note) could be counted and a cellophane window at the front so the coins could be identified and counted. Any problems, returned sealed envelope to pay clerk for a recount. Once the seal was broken, you owned any discrepancy.