One law for all a nation's citizens? The Archbishop of Canterbury doesn't think that's such a good idea:

But Dr Williams said an approach to law which simply said "there's one law for everybody and that's all there is to be said, and anything else that commands your loyalty or allegiance is completely irrelevant in the processes of the courts - I think that's a bit of a danger".
"There's a place for finding what would be a constructive accommodation with some aspects of Muslim law, as we already do with some other aspects of religious law."

Some wonder if such a divided legal system might ultimately widen cultural rifts in the UK.