All the speculation on @BorisJohnson "renegotiation" on #Brexit has focused on 1) time limits to backstop & 2) a timetable for alternative arrangements. But a third option is also in play, as 1) is undeliverable by EU & 2) doesn't go far enough for opponents of May's deal. Thread

This would involve prolonging transition (maximum implementation period currently runs until end 2022) to "bury" backstop & give UK & EU more time to solve Irish border. This idea was originally tested by @theresa_may earlier in year. Was killed by opposition of @DavidMundellDCT

& Scottish Tories who didn't want to be stuck under CFP for longer period. But DUP weren't averse. Would therefore deliver some of ERG. Labour backbenchers previously lukewarm to idea now also likely to be more supportive - as growing number worry about rising prospect of no deal

As IP is = a more comprehensive CU than backstop, this "could also be dressed up as more comprehensive Labour Party policy." It would also be relatively easy to negotiate with EU. Still, many problems. 1) Backstop would still be in WA. What would Boris say about it? 2) Vassalage

Longer transition would require more money to be paid into EU budget; free movement; full rule-taking; ECJ. Can @BorisJohnson realistically sell it? Very sceptical. Which makes an election - either sought by Boris or imposed upon him by @jeremycorbyn - still the strong basecase

But the important point is this. If @BorisJohnson wants to do a deal, & avoid an election that will force him into a pact with @Nigel_Farage or risk @jeremycorbyn in No 10, it's more likely to involve "creativity" around the transition/IP than it is a time limit to backstop. ENDS