The Duke and Duchess of Sussex are visiting New York’s One World Trade Centre on Thursday.

Harry and Meghan will join New York City mayor Bill de Blasio and Governor of New York State Kathy Hochul at the skyscraper’s observatory.

One World Trade Centre was built on the site of the original twin towers and the visit comes just two weeks after the 20th anniversary of the September 11 attacks.

Harry and Meghan will also meet Mr de Blasio’s wife, the first lady of New York, writer and activist Chirlane McCray, and their son Dante de Blasio.

The Sussexes, who welcomed baby daughter Lili in June, are in New York to take part in a worldwide event on Saturday urging leaders to adopt a vaccine equity policy to help end the Covid-19 pandemic.

They are joining the 24-hour broadcast Global Citizen Live being staged in New York’s famous Central Park and around the world.

It is part of a number of shows being held in cities as varied as London to Lagos by the organisation Global Citizen, with artists like Ed Sheeran, Sir Elton John, Kylie Minogue, Metallica and Coldplay scheduled to perform.

Meanwhile, Harry’s sustainable tourism initiative Travalyst has announced internet giant Google as a new partner.

The Google travel team has committed globally to helping consumers make more sustainable travel choices, and their approach aligns strongly with Travalyst’s collaboration principles

Google joins firms including Booking.com, Skyscanner, Visa and Tripadvisor, and the coalition is working to help drive mass adoption of sustainability standards.

Travalyst said teaming up with Google represented a “significant step forward” in its mission.

Sally Davey, chief executive officer of Travalyst, said: “The Google travel team has committed globally to helping consumers make more sustainable travel choices, and their approach aligns strongly with Travalyst’s collaboration principles.”

Google’s chief sustainability officer Kate Brandt said the firm would build tools and technology to enable travellers and businesses to prioritise sustainability.

Searches on hotels, from this week, now include information on their sustainability efforts, with those meeting the standards having an “Eco-certified” badge next to their name.