Unknown British collar? School? Police?

[AirgunnerSon]

Hi from a newbie!
Any help appreciated! bright nickel plated over brass.
UK Maker (still in business but unresponsive) is:

Thomas Fattorini Ltd.
Regent Street
Birmingham

French Motto is:
"Ah Qu'il est Bon le Bon Dieu" which roughly translates as "God is Good"

Thought this may be from a School Corps or local Constabulary perhaps.
Thanks for checking this out