Why does anyone believe another referendum is the answer? Surely its a 'rearranging of the decks chairs on the titanic' thing?
What has not changed?
The vote in parliament is not the same as the vote in the populace and is unlikely to change unless there is a GE.
The EU continue to say there will be no renegotiation, or if there is, the answer will be the same on the WA.
The EU rules will not allow any negotiation on trade until the UK has left the EU.
What has changed?
We will soon have a new PM, of which both contenders have stated if nothing changes there will be a unilateral withdrawal from the EU by the UK
The senior figures in the EU have changed and the new grouping seems to be more 'federalist' than the previous group, and who might therefore see the UK's departure as a 'good thing' because it will aid their march towards a United States of Europe.
What might result from these new conditions in leadership both in the UK and in the EU?
The UK government seems to have (somewhat subtly) dropped the "nothings agreed until everything's agreed" mantra.
The new EU leadership may well want there to be no revocation of A50, so ensuring there is no likelihood of the UK remaining as an ongoing obstacle to a USE and this may play to Boris's idea to move the Backstop issue into the second part of overall deal, in order to break the 'no deal' log-jam.