I can't see Labour agreeing to that; they are still second place in North East Somerset, and on paper it looks more Labour-friendly than Lib Dem-friendly. The Somerset coalfield (Midsomer Norton, Radstock, Paulton) can still elect Labour councillors locally and accounts for a fairly large part of JRM's seat - historically voters there will be why Wansdyke returned a Labour MP. Places like Keynsham and the rural areas around Bath might be more reasonable prospects for the Lib Dems but I think they'd struggle to ever win NES as it currently stands.JRM could be in big trouble in the strange North East Somerset seat at the next General Election. The seat was only created in time for the 2010 election, and its weird boundaries seemed to have been created with a Tory victory in mind. It partly took in the previous Wansdyke seat, which had returned a Labour MP. He contested the new seat and only lost to JRM by a little under 5,000 votes. Why JRM should be worried, apart from the obvious, is that he polled almost the same number of votes in the 2017 and 2019 elections, but his majority over Labour and LibDem combined was approx 6,000 in 2017 but only 2,000 in 2019. The LibDems put in a particularly strong performance in 2019, and the new unitary Somerset Council went to them in the May local elections. As long as Labour agree 'to do a Honiton' in the seat, I foresee it joining neighbouring Bath as a LibDem gain. Surely we won't have to wait for a possible January 2025 date to rid ourselves of these jokers!!
Of course, boundary changes render this moot. There will be a new Keynsham constituency at the general election (which looks to me much safer Conservative than the current NES) which will comprise most of JRM's current seat along with places like Bitton which are in Kingswood now. The more interesting new seat will be Frome which combines the coalfield area with a reasonably large market town which is becoming more and more like Bristol and Bath - Labour should be able to win this if they campaign there.
