Jewish courts are in daily use in Britain, and have been for centuries.
British Jews, particularly the orthodox, will frequently turn to their own religious courts, the Beth Din, to resolve civil disputes, covering issues as diverse as business and divorce.
It is sometimes commented that lack of equality between men and women in Jewish law prevents divorced Jewish women from being "properly" divorced and able to remarry under Jewish law without their (ex) husbands' consent
http://www.independent.co.uk/news/u...ed-in-marriages-by-jewish-courts-1765888.html
You don’t often hear the term ‘Christian law’, although the term ‘canon law’ is sometimes used. It is also often reserved for the Catholic, Anglican and Orthodox churches. The Methodist and United Reformed Churches have set up structures of varying flexibility that act like Canon Law, as have the Baptists.
Canon law affects virtually every aspect of the faith life of over one billion Catholic Christians around the world.