Police collar badge?

Any information on the identity of this badge gratefully received.

Motto written in the scroll at the bottom of the badge reads: CONSTANT BE
 
  In used condition with fixing pins.

Size Approx: W x 23 mm H x 22 mm

Ref: COL
Although I have a lot of items for sale, I am not an expert. 
If I describe one of my items in a way that is wrong, please email me to correct my description.

If you wish more photographs or a better description of anything I am selling, please email me with your requests.
To cover myself I will not guarantee a badge is not a copy. So please satisfy yourself before
 buying, because as you will see from my status, I do not accept returns unless I have mis-described an item.

I do combine postage, so if you buy more than one item, please do not pay until you ask for or I send you a combined postage invoice. 

Thank you for looking and please check out my other items.