I assume by ''experience'' you're referring to May's time as PM and the subsequent GE'19 when there were calls for the opposition parties to formally work together over Brexit, and even calls for a Gov of national unity? Ignoring the useless leadership and intransigent nature of both Corbyn and Swinson, that was always going to be a difficult thing to pull off because Brexit crossed party lines. Brexit can now be put aside electorally, whether we rejoin or not is a battle for another day. This is about trying to oust an incompetent and divisive PM and Gov. I'm not saying a formal alliance will happen, but Starmer and Davey come across as much more rational, pragmatic politicians, so I think it's more likely to happen than previously. There's certainly scope for an unofficial agreement judging by Davey's comment at the weekend when asked if LDs should back Labour in the upcoming Batley by-election, and he replied ''Political parties campaign where they can win.'' Whether it happens or not, this John Redwood tweet shows that the prospect of an alliance worries some in the Gov, especially those like him in vulnerable Blue Wall constituencies... If Labour were to seek a deal with Greens, Lib Dems and even with SNP for a left wing alliance it means they cease to be a national party fighting every seat to try to win a U.K. majority.