His comment came as the European Commission began legal proceedings against the UK after the Government refused to withdraw plans to override key elements of the Brexit divorce settlement.
Commission president Ursula von der Leyen said a “letter of formal notification ” would be sent to the UK after ministers rejected a demand to withdraw the provisions from the UK Internal Market Bill by Wednesday of this week.
Sir Keir Said: “Here we are in October of 2020, weeks away from the deadline for a deal and we are in this absurd situation of threatening court action.
“A deal can be done here, the issues that are there are quite capable of being resolved.
"Both sides need to sit down, resolve them, get a deal. That’s in the national interest – it’s in our interest and the EU’s interest.”
He added: “It’s absurd that with weeks to go the focus and the energy is not on their negotiations, it’s on threatened court proceedings.
“We need everybody around the table, we need to get a deal. The Prime Minister said he had an ‘oven-ready deal’, get on, deliver it – that’s in the national interest.”
In a press statement at the commission headquarters in Brussels, Ms von der Leyen said the move marked the first step in an “infringement procedure” with the British Government now invited to send its observations within the month.
“This draft Bill is by its very nature a breach of the obligation of good faith laid down in the Withdrawal Agreement,” she said.
Good discussion with @MichealMartinTD on #NextGenerationEU & ongoing negotiations with UK.
We share the view that the Protocol on Ireland/Northern Ireland is essential for maintaining peace & stability on the island of Ireland and protecting the integrity of the Single Market. pic.twitter.com/b9jtIJQLTm
— Ursula von der Leyen (@vonderleyen)
“The deadline lapsed yesterday, the problematic provisions have not been removed, therefore the commission has decided this morning to send a letter of formal notice to the UK Government.
“This is the first step in an infringement procedure. The letter invites the UK Government to send its observations within a month.”
Ms von der Leyen gave no indication as to what action could follow if the commission did not receive a satisfactory response.
Full & effective implementation of Withdrawal Agreement will always be an absolute priority for 🇪🇺
It is the result of long EU-UK negotiations & the only way to protect Good Friday (Belfast) Agreement, guaranteeing peace and stability on island of Ireland. #InternalMarketBill https://t.co/92cq1tY6Nj
— Michel Barnier (@MichelBarnier)
A Government spokesman said they would respond to the letter “in due course”.
The Government has argued the Bill – which gives ministers the power override provisions in the Withdrawal Agreement relating to Northern Ireland – is necessary to protect the peace process if there is no agreement on a post-Brexit free trade agreement.
However the move infuriated the EU which accused the UK of violating its treaty obligations after ministers admitted it would breach international law.
Nevertheless, the EU response suggests it is in no hurry to escalate the dispute while talks on a free trade agreement are continuing.
The proceedings adopted by the commission are relatively common, with around 800 open cases against member states last year alone.
A UK Government spokesman said: “We have clearly set out our reasons for introducing the measures related to the Northern Ireland protocol.
“We need to create a legal safety net to protect the integrity of the UK’s internal market, ensure ministers can always deliver on their obligations to Northern Ireland and protect the gains from the peace process.”
Shadow Cabinet Office minister Rachel Reeves said: “Both sides need to drop the posturing and the threats by getting back round the negotiating table and getting a trade deal done.”
Despite the legal action, Downing Street said trade talks with the European Union were being carried out in a “constructive spirit”.
The final formal round of talks will conclude with a meeting between lead negotiators Lord Frost and Michel Barnier on Friday.
The Prime Minister’s official spokesman said: “The discussions are carrying on today. They have been conducted in a constructive spirit and we certainly are committed to continuing to work constructively this week to reach an agreement with the EU.”
It was “certainly possible” for informal discussions to continue next week, the spokesman added.