Being in plain clothes is totally different from being off duty, I've flashed the badge and bluffed it before uniform turned up, with a pair of nasty shop lifters I 'detained'.
The piece of plastic that is your warrant card does not carry your powers. ie. if it is at home and you aren't you don't suddenly stop being a police officer. I've worked in plain clothes for a number of years in my service and have not once produced my warrant card when locking folk up.
In plain clothes I would have my OS kit with me, a totally different scenario.
I always carry my warrant card with me, and producing it does away with the "you're Police prove it" debacle, when you can't produce anything.
Edited by gripper, 09 March 2014 - 07:05 PM.