Britain must pay its Brexit divorce bill even if it crashes out of the bloc without a deal, the EU said Monday, warning that future ties would be threatened if London failed to honour its commitments.

 The stern rebuff from Brussels came a day after British Prime Minister Boris Johnson again said that in the event of a “no-deal” Brexit on October 31, Britain would be free from financial obligations to the bloc.

Johnson said he was prepared to take Brexit talks with the European Union down to the very last minute before the Oct. 31 exit deadline and if necessary to take a decision to leave without a deal on that day.

When asked by Reuters if he was prepared to take talks with the EU right up to Oct. 31, Johnson said: “Well I do think that the EU does tend to come to an agreement right at the end.”

“Clearly for us, the walking away as it were, would come on October 31 when we would take steps to come out on the terms for which we will have by then made absolutely colossal and extensive and fantastic preparations.”

 With the clock ticking and fears of no deal growing, Johnson and EU Council President Donald Tusk clashed at the G7 in France on Saturday, with the British leader insisting the current divorce deal must be changed.

 Asked if the EU would take Britain to court to recover the money, a spokeswoman for the European Commission instead stressed that a future trade deal between Britain and the remaining 27 states could be under threat unless London paid up.

 “As we have said many times before, all commitments that were taken by the 28 member states should be honoured, and this is also and especially true in a no deal scenario, where the United Kingdom would be expected to honour all commitments made during EU membership,” commission spokeswoman Mina Andreeva told reporters.

 “Rather than going into judicial action threat, I think it is important to make clear that settling accounts is essential to starting off a new relationship on the right foot based on mutual trust.”

 Jean-Claude Piris, who served as director of the EU Council’s legal services for more than two decades, tweeted: “If the UK refuses to pay its debts to the EU, then the EU will not accept to negotiate a trade agreement with the U.K.”

 Johnson has repeatedly said that if Britain leaves without a deal it will not have to pay the 39 billion pound (43 billion euro, $48 billion) divorce bill agreed by his predecessor Theresa May.

 He repeated the claim again on Sunday, telling Britain’s ITV broadcaster that the money would be “no longer, strictly speaking, owed” and his government would be left with “very substantial sums” to spend.

 Downing Street has reportedly refused to say how much the UK would be prepared to pay, though a report in the Times newspaper on Monday quoted a figure of seven billion pounds.

 The tough line from Brussels echoes comments by a French official last week who warned London against thinking “there’s not a deal, so I won’t pay”, saying “there’s no magic wand that makes this bill disappear.”

 Johnson is adamant the withdrawal agreement struck by May − rejected by his lawmakers three times − is dead in the water and changes must be made, particularly on the arrangements for the border between EU member Ireland and British-ruled Northern Ireland.

EU leaders should pay no heed to British lawmakers who say they can stop Brexit, a senior UK government source said on Monday, repeating Johnson’s line that Britain will leave the bloc on Oct. 31 with or without a deal.

Britain has yet to agree a deal with the European Union on the terms of its departure, raising the prospect of an unmanaged exit which is forecast to disrupt the flow of goods and people at the British border.

Fearful that a “no-deal exit” would trigger long-term and widespread economic damage, some UK lawmakers - including members of the ruling Conservative Party - have vowed to do whatever it takes to prevent one - much to Johnson’s annoyance.

“We are leaving on October 31 with or without a deal. European leaders should not be listening to the very wrong messages emerging from some parliamentarians who think that they will be stopping Brexit,” said the official, who spoke on condition of anonymity.

Agencies