Dougie, reminds me, the delightful ops assistant (clerks in those days) used to respond to Micks in the most delightful collection of garments.
One call out I stupidly asked why. They said that that way the knew they would be sent back to change, they could then wash, shower etc and return.
Sadly, after my curiosity the word went round and they afterwards always came in blues. I had meant no rebuke, honest.