Yes we do. It's uncodified (meaning not all in one document) and in very small part unwritten but we still have one. This is politically controversial but not

Yes we do. It's uncodified (meaning not all in one document) and in very small part unwritten but we still have one. This is politically controversial but not in the grand scheme of things a big deal in my view. The anti Brexit groups have been playing hardball with legal and constitutional 'innovations' for some time and now the pro Brexit camp are responding in kind. It's also worth noting that John Major used this very device in 1997 to avoid scrutiny over the Cash for Questions affair and it's also been used for political purposes recently in Canada. The rhetoric of the anti Brexit side in the media over this is doing Johnson's work for him - he wants a 'people vs the establishment' election (and he'd likely do very well with that) and people who lost the referendum screaming 'coup' plays right into that narrative.