Boris Johnson will tell Angela Merkel today that parliament cannot stop Britain leaving the European Union without a deal on October 31.

Amid an intensifying row with Brussels, the prime minister will warn the German chancellor over dinner in Berlin that there will be no Brexit agreement unless the EU backs down and agrees to scrap the Irish backstop.

The tough approach comes after Leo Varadkar, the Irish prime minister, highlighted attempts by Remainer Tory MPs to stop a no-deal Brexit during a one-hour call with Mr Johnson on Monday night.

Downing Street believes that Brussels is unlikely to enter into negotiations over a new agreement while parliamentary attempts to stop a no-deal exit and potentially bring down Mr Johnson’s government continue.

The government has