I don't have any facts about Sharia law. They are probably hard to come by as many muslims may be reluctant to admit they adhere to a controversial (in Western Europe) system that is at odds with the constitutional/common/civil/statutory law of the host country.
Stacey Dooley's BBC(!) documentary about her return to Luton did feature her discussing Sharia law with some muslims. It's about 4 mins into this clip: