Theresa May has set out details of her vision for a future economic relationship with the European Union which she believes can deliver "an optimistic and confident future which can unite us all" leaving Britain "a stronger and more cohesive nation".
In a high-profile speech at London's Mansion House, the Prime Minister set out five "foundations" to underpin the new relationship - including binding commitments to fair competition and a new arbitration mechanism to resolve disputes.
She repeated her "red lines" that the UK will leave the single market and customs union and the jurisdiction of the European Court of Justice, but she also spelt out greater details on the customs arrangements Britain wants to avoid a hard border on the island of Ireland.
Declaring that she was "confident" that a deal is "achievable", May said her message to Brussels was: "We know what we want. We understand your principles. We have a shared interest in getting this right. Let's get on with it."
She vowed that she would not walk away from talks over the coming months. But in response to questions, she made clear that she stands by her mantra that "no deal is better than a bad deal".
May acknowledged that neither side would get "exactly what we want" from Brexit negotiations, and that access to each other's markets will be reduced after UK withdrawal.
In an apparent appeal for compromise on both sides, she said that both the UK and EU need to "resolve tensions" in their positions, urging Brussels to face up to "hard facts" and show "pragmatic common sense" in helping to deliver the best outcome for both sides.
The Prime Minister challenged the European Commission's insistence that "cherry-picking" of EU rights and obligations cannot be allowed.
Setting out her desire for a deal "tailored to the needs of our economies", May insisted that all free trade agreements offer varying market access depending on the interests of the countries involved.
"If this is cherry-picking, then every trade arrangement is cherry-picking," she said. "What would be cherry-picking would be if we were to seek a deal where our rights and obligations were not held in balance. And I have been categorically clear that is not what we are going to do.
"What is clear is that for us both to meet our objectives we need to look beyond the precedents, and find a new balance."
May said that any deal on the future UK/EU partnership must pass the "five tests" of respecting the result of the 2016 referendum; delivering an enduring solution; protecting security and prosperity; leaving Britain as an "open, outward-looking, tolerant, European democracy; and strengthening the union of the UK.
Shee said the agreement should rest on "five foundations", which are eciprocal binding commitments to ensure fair and open competition; a completely independent arbitration mechanism to resolve disputes; an ongoing dialogue with the EU, with regular consultation; an arrangement for data protection, and measures to maintain links between people.
May said: "The world is watching.
"We should not think of our leaving the EU as marking an ending, as much as a new beginning for the United Kingdom and our relationship with our European allies.
"Change is not to be feared, so long as we face it with a clear-sighted determination to act for the common good.
"Nor is Brexit an end in itself. Rather, it must be the means by which we reaffirm Britain's place in the world and renew the ties that bind us here at home.
"And I know that the United Kingdom I treasure can emerge from this process a stronger, more cohesive nation.
"This is an optimistic and confident future which can unite us all."
Looking ahead to the talks due to begin at the European Council summit on March 22 and lead to broad agreement on the future relationship by October, Mrs May said: "Yes, there will be ups and downs over the months ahead.
"As in any negotiation, no-one will get everything they want.
"We will not be buffeted by the demands to talk tough or threaten a walk-out. Just as we will not accept the counsels of despair that this simply cannot be done.
"We will move forward by calm, patient discussion of each other's positions. It is my responsibility as Prime Minister to provide that leadership for our country at this crucial time.
"By following the course I have set out today, I am confident we will get there and deliver the right outcome for Britain and the EU."
Key features of the vision set out by Mrs May included:
- UK courts will "continue to look at" judgments of the ECJ and may seek to ensure that identical laws on each side of the Channel are interpreted consistently;
- Britain may commit to "remaining in step" with EU regulations in areas like state aid and competition and Brussels should be confident the UK will not engage in "a race to the bottom" on standards;
- While there will be controls on numbers of people entering the UK, British and EU citizens will still be able to work and study in one another's countries;
- Trade in goods should be "as frictionless as possible", with no new tariffs or quotas;
- A comprehensive system of mutual recognition of regulatory standards, so that goods do not have to be approved in more than one country, along with a UK commitment to maintain "substantially similar" standards;
- UK to seek associate membership of Europe-wide medicines, chemicals and aerospace agencies, with an "appropriate financial commitment";
- In order to avoid a hard border in Ireland, either a customs partnership, under which the UK "mirrors" EU requirements on goods from around the world, or a streamlined customs arrangement, using technology and "trusted trader" schemes to do away with the need for customs checks;
- Environmental and animal welfare standards to remain "at least as high as the EU's";
- Joint working to manage fish stocks sustainably and agree mutual access to waters;
- A limit on barriers to UK and EU services companies setting up in one another's territories, with an appropriate labour mobility framework and mutual recognition of qualifications;
- Mutual recognition of broadcasting licences;
- A system to replace existing "passporting" arrangements, allowing financial services companies to access markets in the UK and EU by maintaining "the same regulatory outcomes over time";
- "Broad" co-operation on energy, including a "close association" with Euratom, as well as continuity of transport services and "flexible" domestic regulation for the digital sector to allow it to respond to developments in the EU digital single market.
In what may be seen as a swipe at US president Donald Trump a day after he announced new tariffs on steel, May said: "In all these areas, bold and creative thinking can deliver new agreements that are in the very best interests of all our people - both in the UK and across the EU.
"And in the face of a worrying rise in protectionism, I believe such agreements can enable us to set an example to the world."