I can't tell exactly what you're calling for here. You might mean:
1) You want the Church of England to be separated from the UK government, so that it is no longer an established church. (Fine by me, as my country hasn't had an established church in over two centuries, but it's not up to me to say what the UK should do.) OR,
2) You want non-Anglicans to have the freedom to worship as they please. (I thought the UK already had that.

) OR,
3) You want the Church of England to split, with some CofE parishes leaving to form their own, alternative, Anglican denomination that is no longer part of the Church of England, something like what happened in the US with the ACNA, and you want the parishes to be able to keep their historic church buildings as they leave.
Is one of these what you have in mind?