both labour and tory manifestos at the last election undertook to respect the referendum, and the enactment of A50 was almost unanimously supported by parliament. since then, tory Brexiters have been lining up to put Brexit at risk by repeatedly voting against real existing Brexit. Now most of them promise to renegotiate the UK’s withdrawal agreement with the EU, even though the Europeans insist they won’t renegotiate, having already refused to do so with Britain’s last two prime ministers. the EU can't cave and give Britain a sweetheart deal, or else every member state would want one and the single market would fall apart. and yet it's not just a tory perspective - Labour leader Jeremy Corbyn plans to try the renegotiation futility as well.