Hazard imo:
- If the UK does not concede on the NI border, the EU are most unlikely just to steamroller over the RoI
- many British people don't realise that most EU members are small countries, who would take this as a very alarming precedent.
Therefore, any NI border agreement - whether "creative" or not - will almost certainly require full consent of the RoI
Without an agreeement on the NI border, there will be no WIthdrawal Agreement, no deal and no transition
So, that's jumping over the cliff, without hanglider wings or safety net.
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The A50 default is no deal, i.e. unless a deal is specifically agreed, it's cliff edge
Extension of A50 can only be permitted if the UK govt officially requests it AND if the other 27 members agree unanimously.
They are very unlikely to agree, unless they see a clear change in UK policy is likely, e.g. a new govt or a GE ... provided this is not too near 29 March.
So, there may be no time for the MPs to do anything
MPs can obstruct govt legislation, but the (unwritten) Constitution gives MPs little power to force a govt to carry out a specific action it doesn't want to do, especially if that action is very complex
One option is the "humble address" - but there is only time for them to require the govt to do a very simple action, e.g. sign the draft WA, possibly requiring the WA to include Norway+ as an aspirational future framework.
- NO, Labour has insufficient MPs to force a GE, even with the SNP & Plaid, because the Tories and DUP combined form a majority.
If sufficient Tories rebelled, or the DUP dumped the Tories - risking their bogeyman Corbyn as PM - then the govt could fall.
In that case, the Queen would ask the Leader of the Opposition (currently Corbyn) if he is able to form a govt.
Even with LDems, SNP & Plaid, he would need several Tories to give him "Confidence & Supply" which is unlikely if that means JC being PM, but not if say JC falls under a bus and Starmer becomes leader.
If the leader of the Opposition cannot form a govt, then there would be a GE.