In absence of a written constiution, the UK faces a period of uncertainty in respect of the implementation of Brexit by service of the required Article 50 notice. Interesting legal and political questions need to be resolved. If the ball is eventually going to be in the hands of Parliament in respect of the Article 50 notice, is it inevitable that they will never pass it and the PM of the day might be relieved of the duty to serve it?

This article provides a very useful assessment of the issues involved in this constitutional quagmire