Two thirds of a site earmarked for the development of a garden city in Kent has been sold for an undisclosed sum, it has been reported.

Land Securities is thought to have sold most of the Eastern Quarry near Bluewater to Henley Camland, a joint venture between private equity firm Henley Investments and infrastructure specialist Camland.

The brownfield land at Ebbsfleet has outline planning permission for more than 6,000 homes and 231,000 sq metres of floorspace for businesses.

The chunk sold to Henley Camland reportedly has capacity for about 4,700 homes, with a development value of about £1.1 billion, according to Property Week.

Land Securities is understood to have retained a third of the site, which has space for another 1,500 homes.

George Osborne outlined in 2014 his hopes for a 15,000 home garden city at Ebbsfleet and revealed £310 million of funding for the project in last November’s autumn statement.

However, so far, only Ward Homes has built any homes at the site, having exchanged contracts with Land Securities in 2013 for a six-acre plot with space for 150 homes.

It has also emerged that Louise Wyman, director of strategy at the Ebbsfleet Development Corporation, is to leave the organisation at the end of next week.

She is said to be preparing to lead the wider garden city programme for the Department for Communities and Local Government.

The development corporation’s chief executive Robin Cooper stepped down in December last year after just five months in the job.

He was replaced by interim chief executive Paul Spooner until a permanent replacement is found.

Land Securities and Henley Camland declined to comment.