Jeremy Corbyn will say the UK is facing a Brexit “crisis” later and vow to do “everything necessary” to stop the UK from leaving the EU without a deal.
The Labour leader will say the Tory party has “failed our country” and a general election is the “change of direction the country needs”.
It comes after a leaked government report warned of food and medicine shortages in a no-deal exit.
Cabinet minister Michael Gove said it outlined a “worst-case scenario”.
Mr Gove, who is responsible for no-deal preparation, said the cross-government study, codenamed Operation Yellowhammer, was old and that Brexit planning had accelerated since Boris Johnson became prime minister.
A No 10 source told the BBC it was leaked to the Sunday Times by a disgruntled ex-minister in