The EU can not formally sign its future relationship with the United Kingdom until Britain is a "third country" in March 2019. But a status-quo transition period through 2020 means those are less pressing than the need for an Irish border deal which both sides want as part of a pre-withdrawal treaty.
Earlier this week, Mr Carney said Brexit has knocked real household incomes by around £900, and lowered growth by "up to 2%" against what the Bank of England had expected in 2016 if the United Kingdom had voted to remain in the EU.
Theresa May wants to resolve the issue through a special customs agreement for the whole of the United Kingdom that would render border checks unnecessary.
CHRIS J RATCLIFFE via Getty Images Labour MP Hilary Benn the remainer who chairs the Brexit Select Committee
After Mrs Braverman's admission, it was revealed the chief executive of HMRC had written to the same committee to warn elements of a proposed plan to replace the EU customs union after Brexit could take three years to put in place - beyond the transition period.
That was ruled out by the European Union official, who said any solution would have to be "Ireland specific" before adding: "We have to do away with the fantasy that there is an all-UK solution".More news: President Trump delivers commencement speech at US Naval Academy
The UK wants full access to the system after Brexit and today said they would claim back their £1bn investment if they did not receive it.
The EU has said Britain will be able to continue to use Galileo's open signal, but Britain's military could be denied access to the encrypted version when the satellite becomes operational.
European Union chief negotiator Michel Barnier said earlier that progress needs to be made on guaranteeing a unique solution by June so that a hard border can be avoided.More news: IPL 2018, 2nd Qualifier | SRH vs KKR: Everything you need to know
"I have to say on the basis of this week's discussions, I am a bit concerned because the pre-condition for fruitful discussions has to be that the United Kingdom accepts the consequences of its own choices", the official added.
DExEU presented its plans on Wednesday for a future science, research and innovation partnership between the United Kingdom and EU, which included a promise to "respect the remit" of the European Court of Justice (ECJ) when the United Kingdom participates in EU programmes. "We are talking here about the lives and the liberty of people".
"And in order to achieve this, we need to leave the customs union". As usual we've heard it all before.More news: British Labor Movement Rejects Reinstatement of Border with Ireland
The official said the United Kingdom has promised new ideas within the next two weeks, but sounded concerned about possible progress.