I would think the 'vested interest' many people have in the outcome is to find out EXACTLY what Brexit means in terms of both their every day lives as well as in terms of investment and business for the UK/Europe.
At the very least Parliament will, or should, ask for a clear (as clear as is possible anyway !) manifesto of events ...i.e. EU citizens living and working in Europe ....and UK citizens living and working, or retiring, to mainland Europe ....and their rights following the exit of the UK .....trading terms and arrangements, and the likelihood of costs increasing. The problems of Gibraltar.border with Spain, Irish borders ......(and maybe Scottish borders eventually !!) ....nothing is clear and nothing has been explained. Its all very well for the PM to inform people that she is not prepared to give a running commentary, but SOME idea would help people plan for their future. I watched QT last night, and I could not believe the people who shouted 'The UK voted OUT so why aren#t we out' ...why haven't you triggered Article 50 ? You said this, you said that (to the |Politicians on the Panel) ...how ignorant is that ?! of course it was never going to be instant as some people thought it would be ......for the promises alone, which were obviously hype that could never be achieved (millions more each week for the NHS ...closed border immediately !) this is what the people wanted to hear ,,,and so they believed it, Throughout history wars have been caused because lies have been told by seemingly charismatic idiots ...wherever there are people who feel aggrieved and left behind in terms of wealth and lifestyle so they wanted to believe ...whereas all the three musketeers seemed to regard the referendum as a bit of a 'jolly jape, what !' with their painted busses and ranting and raving .....no wonder they have gone to ground ! With dear Boris as foreign secretary what next ? WWIII I shouldn't wonder ......even some people who voted OUT are now thinking they made mistake .....so what hope for the rest of us ? I think the ultimate decision should be left to the EU and M. Junker ...who would have us all out and the gate slammed shut afterwards ,,,to teach any other EU member state a lesson ...for which we will all suffer ! Power to the People ?? not such a good idea...