In reply to andyfallsoff:
> It does have a constitution, though. You accept as much yourself with your unattributed quote - "does not have a codified constitution but (an unwritten) one formed of Acts of Parliament, court judgments and conventions". All of which are written down, just not in one single document labelled "Constitution" - the "unwritten" bit is a common description, but it isn't correct.
They should therefore not referenced a constitution ,but they should have said which "Acts of Parliament, court judgments and conventions" they were referring to and would be challenging ( then we could look it up, and see for ourselves)
My guess is that any legal challenge will take so long as to be overtaken by events that will follow after we have a new PM.