British Prime Minister Theresa May will set out her vision on Friday for a Brexit deal deeper and wider than any free trade agreement in the world, telling the European Union it is in their "shared interest."
In a much-anticipated speech which an increasingly frustrated EU hopes will offer details of her plan for Britain's future after Brexit, May will try to defuse a dispute over the border with Ireland that threatens to stall the Brexit talks.
But the prime minister, weak after losing her parliamentary majority last year, will struggle to satisfy the demands not only of EU officials but also of the warring factions in her Conservative Party and businesses desperate for clarity.
The 61-year-old leader has long kept her cards close to her chest, trying to avoid provoking those who want a clean break with the EU, or others who fear the world's sixth-largest economy will suffer if barriers are raised against a major trading partner.
Excerpts of the speech, issued before Friday's event in London, offer little detail, but say May will be guided by five tests including respecting the result of the Brexit referendum and reaching a solution that can endure.
"So I want the broadest and deepest possible agreement - covering more sectors and co-operating more fully than any Free Trade Agreement anywhere in the world today," May will say.
"I believe that is achievable because it is in the EU's interests as well as ours and because of our unique starting point, where on day one we both have the same laws and rules. So rather than having to bring two different systems closer together, the task will be to manage the relationship once we are two separate legal systems."
May hopes the speech, titled "Our Future Partnership", will round off a series of briefings by her ministers to settle the question of how Britain sees its future outside the EU and its economic architecture after more than 40 years.
But at least for one EU official, her words so far were underwhelming. "If she says nothing more than that, too bad," the official said on condition of anonymity. "It seems that they still want to get out of the trap of ready-made solutions."