Sir Keir Starmer has been sent a warning shot after the Green Party's leadership hopefuls opened the door to a pact with Jeremy Corbyn's new left-wing outfit.
Zack Polanski, dubbed an 'eco-populist', said it would be 'madness to not at least be curious' about whether Mr Corbyn's party would offer a coalition or alliance.
Ellie Chowns, who is rivalling Mr Polanski for the Green leadership on a joint ticket with Adrian Ramsay, also did not rule out joining forces with Mr Corbyn.
She told Channel 4 that 'cooperation is in the DNA of the Greens' as she spoke about possible links with the former Labour leader's new movement.
Mr Corbyn has teamed up with fellow ex-Labour MP Zarah Sultana to launch an outfit currently known as 'Your Party'.
