And yet the UK has at least 85 sharia courts that operate legally.

(Guardian) — David Cameron will emerge as the victor from a bitter cabinet battle over multiculturalism this week as the government unveils a hardline approach to tackling Islamist extremism.

Home Office sources say that Cameron has quashed Nick Clegg’s argument for a more tolerant attitude to Muslim groups by insisting on a strategy centred upon the notion that violent extremism is incubated within the ideology of non-violent extremism.

The shift in approach will be outlined when the government’s counter-terrorism strategy is unveiled by the home secretary, Theresa May, on Tuesday. Central to the Prevent strategy is a broader definition of extremism that will be extended beyond groups condoning violence to those considered non-violent but whose views, such as the advocacy of sharia law, fail to “reflect British mainstream values”.

A Home Office source said: “There will be a direct challenge to these [non-violent] groups.”

The Prevent review has been delayed for five months because of disagreements within the coalition cabinet. In his view that engaging with non-violent extremists can be used as a bulwark against violent extremists, Clegg has been joined by the attorney general, Dominic Grieve, the Tory chairman, Baroness Warsi, and others including Charles Farr, the head of the office of security and extremism. They argue it is crucial to maintain a distinction between violent and non-violent extremism and that it is necessary to engage rather than alienate.