The UK and the EU will remain the “best of friends” but they will “not be as close as before” after Brexit, the new European Commission president says.
Speaking ahead of talks with the PM, Ursula von der Leyen warned of “tough” talks ahead as they discuss the UK-EU relationship after Brexit.
Boris Johnson will meet her later to stress the importance of reaching a trade deal by the end of 2020.
But Mrs von der Leyen called the deadline “very tight”.
It was “impossible to negotiate” the whole trade deal before the 2020 deadline and it was important to “prioritise” issues, she added.
After its 31 January exit, the UK will enter into an 11-month transition period in which it will largely follow EU rules but will not have any representation in the bloc’s institutions. This period will come to an end on 31 December 2020.
Mr Johnson has insisted a deal is possible by the end of 2020 and the process will not be extended.
Once the UK leaves the EU, the two sides will begin talks on their future economic relationship.
Speaking at London’s LSE, Mrs von der Leyen said the EU was “ready to negotiate a truly ambitions partnership with UK”.
But she said: “We will go as far as we can, but the truth is that our partnership cannot and will not be the same as before and it cannot and will not be as close as before because with every choice comes a consequences with every decision comes a trade off.”
Mrs von der Leyen, a former German defence minister, took over from Jean-Claude Juncker at the start of December. She was a student at LSE in the 1970s.
She added: “There will be tough talks and each side will do what is best for them, but I can assure you the UK will always have a trusted friend and partner in the EU.”
She said she hoped the new trading relationship would be based on “zero tariffs, zero quotas, zero dumping”.
But she said: “Without the free movement of people you cannot have the free movement of capital and services.
“The more divergence there is the more distant the partnership will be.”
Mrs von der Leyen also warned that without an extension of the transition period beyond 2020 “you cannot expect to agree every single aspect of our new partnership”.
Opposition MPs have warned that trade deals typically take years to conclude and, with relatively little time available, the UK risks defaulting to World Trade Organisation rules at the start of 2021, potentially leading to damaging tariffs for some industries.
But Brexit Secretary Stephen Barclay told BBC Breakfast that the UK and EU had agreed in the political declaration to do a trade deal by the end of this year and they are “confident” they will do that.
“Of course there will be planning within Whitehall for any eventuality, but we aim to get a trade deal,” he said.
“Both sides are clear they want a trade deal, the political declaration says it can be done to that timetable, let’s be positive.”
And No 10 said Mr Johnson was expected to tell the EU president that he is confident of getting a deal and, having waited for more than three years to leave the EU, both British and EU citizens expect the next phase of trade negotiations to conclude on time.
Downing Street added that the PM was likely to underline to Mrs von der Leyen and the EU’s chief negotiator Michel Barnier that the objective was securing an ambitious, tariff-free trade agreement rather than continued regulatory alignment.
‘Expect red-line drawing with smiles’
The meeting between Boris Johnson and new European Commission President Ursula von der Leyen is significant in that it’s their first face-to-face in their new roles – but today does not mark start of post-Brexit trade talks.
EU law dictates that trade talks can’t start until the UK legally leaves the bloc. Then EU countries must agree a mandate for the EU Commission to negotiate a comprehensive trade agreement on their behalf.
This mandate then has to be formally signed off at minister level by representatives of all EU countries.
All this means, the EU says, is trade talks will start at the beginning March.
When UK ministers complain that’s too long to wait, the EU response is that the UK always pushed for bigger role for national governments in EU decision-making to make it more democratic.
Expect red-line drawing with smiles today between the prime minister and Mrs von der Leyen – presented as “friends telling each other truths”.
The EU position is that the prime minister’s timetable to get an “ambitious, comprehensive” trade deal agreed and ratified by December is unrealistic.
However, the prime minister will counter this with “truths” of his own, including that negotiations have to be done by December because he won’t extend the transition period.
Legislation implementing the terms of Mr Johnson’s Brexit deal continues to move through the Commons, with the government easily winning all three votes on the Withdrawal Agreement Bill on Tuesday.
The bill will enshrine in law the terms of the transition period, first negotiated by Mr Johnson’s predecessor Theresa May, as well as agreements on citizens’ rights, customs arrangements in Northern Ireland and the UK’s financial settlement.
On Wednesday, MPs will look at parliamentary oversight and issues relating to Northern Ireland.
The DUP, SDLP and Alliance have jointly suggested amendments – suggested changes to the bill – to ensure a legal guarantee that Northern Ireland businesses will have “unfettered access” to the rest of the UK.
The SDLP and Alliance oppose Brexit, while the DUP says the deal would undermine Northern Ireland’s place in the UK.