All Labour have said on it is that they hope to reduce restriction on some goods but also trying to renegotiate it, Who ever is in are likely to try and ease what they can.The EU seems pretty rational, and our side hoist by their own petard hence the billhooks NI “deal”. There is still a chance for rishy to push through a sensible deal on that but sadly labour wouldn't vote with him on it, focussed as they are on maximising their majority at the next election
Blup
Rejoin or similar - I can't see any party pushing for that but the Liberals may be thinking that way but are there practical problems - an obvuous one is money and contributions. On the other hand if we fall far enough maybe we would get more back than we put in to bolster the place up.
Fact is all empires fall eventually and the west has had a good run. A lot of it seems to be faltering one way or another and the main action is elsewhere. That needs to sell stuff somewhere though so long term who knows how it will work out.