Babylon is said to be exploring a US listing that could value the health app at $4bn (£2.8bn) as its business continues to grow during the Covid-19 pandemic.

The digital health company has been approached by several special purpose acquisition companies about going public via a Spac merger, according to sources speaking to Bloomberg.

Babylon is also believed to be weighing a traditional initial public offering in the US.

The health tech group, which has its own digital doctor app and also provides the NHS GP at Hand service, has long been eyeing expansion in the US and is currently advertising for director of SEC reporting and technical accounting to be based in San Francisco.

"We have a leg in the United States and we are as much of an American company now as we are a British company," Ali Parsa, CEO of Babylon, told The Telegraph earlier this month.

This week, the company also announced the appointment of a chief business officer, chief operating officer and chief technology officer for its US operations.

Babylon currently has between 300 and 350 staff in the US, based across three offices in New York, California and Austin. Up to 80pc of the company's revenue comes from the US.

A $550 million cash infusion led by Saudi Arabia’s Public Investment Fund in 2019 valued the company at about $2 billion.

It put Babylon in a position to grow when the coronavirus pandemic hit last year and the company is hoping this is a watershed moment for health tech.

"There's no question that we need to come out of this pandemic and rethink the model of delivery of healthcare," said Parsa, who envisions a future where people can monitor their health in advance of getting ill so they can catch warning signs early.

"What we've done with our cars now is we've buried so many sensors in them that we monitor everything about our cars, and then the sensors will tell us when the car is going wrong," he said.

"Imagine a world in which we do exactly that, where we collect so much data from you to your devices so our job is to monitor you so that you never have surprises."

A representative for Babylon declined to comment.