Ass-wipe!
Why the hell is he even allowed in Britain!! Get him the hell out of here!
He was born in Britain so he's a British citizen.
But I would argue that if he's so desperate to live under the Shariah, then he should emigrate to a country which has a higher chance of implementing it fully (like Saudi Arabia).
But on the other hand, I guess he is doing his Islamic duty which is to convert all non-Muslim land into Muslim land, and implement the Shariah.