London: Premier Gladys Berejiklian says Brexit provides NSW with the opportunity to become the "manufacturing capital of Australia" as she heads into trade talks with key European companies.

Ms Berejiklian, who is on a week-long trade mission to Europe, is the first NSW premier to travel to Britain in 14 years and says the time is right for the state to seize on opportunities.

NSW Premier Gladys Berejiklian. Credit:Steven Siewert

As the October 31 deadline looms for Britain to leave the European Union, Ms Berekilian said NSW should have more investment diversity, especially in the western Sydney airport.

"This is such an important opportunity for NSW in terms of creating jobs for the future," Ms Berejiklian said at a reception in London hosted by Australian High Commissioner George Brandis.