Watch what you're stepping in if you hear "Code 2" in Primark ;-)
https://www.manchestereveningnews.co.uk/whats-on/shopping/ex-primark-employee-reveals-grim-18112509
The announcement that I used to love hearing in Asda was "All staff get ready to rumble" ;-)
One of the best announcements (or, rather, series of announcements) that I've heard was in a branch of The Range. It started off with a regular "Please would a member of the Pets' Department come to the Customer Service Desk. Customer waiting"
Some time later, it changed to "PLEASE would a member of the Pets' Department come to the Customer Service Desk. Customer waiting a long time!"
Then, finally, it became "PLEASE, PLEASE, PLEASE would a members of the Pets' Department come to the service desk. That's PETS, as in WOOF WOOF, MIAOW MIAOW! Customer getting fed up of waiting!"
At the rail station I worked at, "All platform staff to the Supervisor's Office, please" meant exactly the same as the more cryptic "Code Tango One". It meant that I'd got the kettle on for a brew ;-)