It's not laziness asking for you to back up your claims.
You've found another website with a paragraph on it, I see.
If you'd done your research, you'd know that these 'Sharia courts' have zero jurisdiction in the UK and any religious judgements or performed ceremonies that are held have no legal status in the UK and any marriages aren't recognised as legal marriages.
So again I ask you for some sort of evidence of Sharia law trumping British law, because this ain't it.