The European Union has launched legal proceedings against the UK after it failed to withdraw legislation that would breach the Brexit deal both sides signed last year and break international law.

The announcement comes after weeks of controversy since Boris Johnson’s government revealed its plans to put in place legislation that would override a specific part of the Withdrawal Agreement called the Northern Ireland Protocol.Speaking in Brussels, Ursula von der Leyen, President of the EU Commission, said that the EU had invited the UK to “remove the problematic parts of their draft internal market bill by the end of September.” She said that the draft bill is “by its very nature a breach of the obligation of good faith laid down in the Withdrawal Agreement,” adding that “it will be in full contradiction” of the Northern Ireland Protocol.The protocol was agreed in order to eliminate the need for border checks between the only land border shared by the EU and UK on the island of Ireland. Both sides fear that checks could lead to a hard border and the return of sectarian violence that Ireland and Northern Ireland hoped was a distant memory.