Sheep are to graze on Hampstead Heath for the first time in 60 years.
On Monday a small flock of five Oxford Down and Norfolk Horn sheep will be released on to the North London park for a week-long trial.
It is hoped the grazing could prove an eco-friendly way of maintaining the centuries-old heath.
City of London Corporation, which runs the park, said: “Grazing is known to play a major role in boosting species-rich wildlife habitats.”
It said: “Unlike mowing, grazing produces a mosaic of vegetation heights and types, improving ecological sites for species including amphibians, small mammals, invertebrates and wildflowers.”
The development follows months of speculation about livestock being brought back to the 790-acre Hampstead Heath for the first time since the 1950s.
The sheep will be provided by Mudchute Park and Farm on the Isle of Dogs, East London.
They will graze at The Tumulus, a Roman monument over an ancient burial ground close to Parliament Hill, which is managed by Historic England.
Fencing has been installed around the area to protect the sheep, which will be kept at the heath’s nearby Kenwood Yard overnight.
Volunteers from the Heath and Hampstead Society, and Heath Hands will support the project by monitoring the sheep and “engaging with visitors”.
If successful, the pilot could be expanded to other areas of the heath, the Corporation said.
The park, situated just 6km (3.7 miles) from Trafalgar Square, is one of London’s most popular open spaces, receiving nine million visitors per year.
John Beyer, vice chair of the Heath and Hampstead Society, said the idea was inspired by early 19th-century landscape paintings by John Constable.
“This romantic vision happily coincided with the aim of heath staff to experiment with grazing rather than tractors to manage the landscape,” Mr Beyer said.
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Karina Dostalova, chairman of the Corporation’s Hampstead Heath management committee, said: “The heath has a long history of sheep grazing with farmers taking their flock to the site before taking them to market in the City.
“Reintroduction of grazing has been an aspiration for many years, and we are glad to be working with our partners on this exciting opportunity.”