After its divorce from the European Union takes effect on Friday night, Britain will be free to negotiate its own trade pacts.
British Prime Minister Boris Johnson insists that date will see Brexit "done".
Britain must now move onto so-called "equivalence", whereby financial firms agree to meet EU rules to maintain access to its market.
EU negotiator Michel Barnier said during the next phase of Brexit, Brussels and London will "have to rebuild everything".
Britain will become the first country to leave the EU at 2300 GMT on Friday, ending nearly five decades of membership.
The US has banned Huawei from the rollout of its next generation 5G mobile networks because of concerns.
Britons vote by 52 percent to 48 percent to become the first nation to leave the EU bloc.
As a permanent member of the UN Security Council, London wields veto power equal to Paris, Washington, Moscow and Beijing.
He will represent Queen Elizabeth II at the Church of Scotland's General Assembly from May 16 to 22.
The head of state's ceremonial approval of the withdrawal legislation allows Britain to leave its closest neighbours and trading partners.
The unelected upper House of Lords made some changes this week, including on the rights of EU citizens and child refugees after Brexit.
European Commission president Ursula von der Leyen said that Britain knows it has to align itself with single market rules if it wants to be close to it.
In the UK Africa Investment Summit 2020, Johnson made a clear pitch for business less than two weeks before Britain leaves the European Union.
Britain's exit from the European Union should take effect at the end of this month.
The two sides have until the end of the year to secure an agreement.
The momentous day on which Johnson effectively won permission to abandon the European integration project was all but ignored in Thursday's media.
The Brexit deal covers separation issues such as EU citizens' rights and Britain's financial settlement.
Lawmakers begin debate on legislation to enshrine Johnson's divorce deal.
Many blamed Labour's defeat on Corbyn's leadership and ambivalent stance on Brexit.
Boris Johnson will hold his first meeting with the new European Commission President, Ursula von der Leyen, in London on Wednesday.
Investors remain upbeat about the global outlook after Washington and Beijing eventually reached a trade agreement to ease tensions between the two.
Key European markets showed increases of 25 percent or more for the year.