AN historic ruin, still said to be the best preserved example of Norman architecture in the UK, has become the setting for the latest chapter in the story of a £1.5m rejuvenation project pioneered by English Heritage.

Richmond Castle is home to the fourth contemporary garden opened at monuments cared for by the agency.

The new Cockpit Garden, perched on a rocky outcrop with sweeping views over the castle walls to the River Swale below, has taken almost two years to complete.

Designed by Manchester-based landscape architect Neil Swanson, it includes cobbled paths which take visitors through a series of open spaces, paths and passageways.

In the centre is a natural grassy arena, surrounded by topiary shapes which reflect the castle's military history dating back to the twelfth century, although there are also reminders of the 16 conscientious objectors imprisoned in the keep during the First World War.

Among those invited to the launch last week were relatives of the men who, although once reviled, are now better understood.

Martyn Gaudie, the son of one of the 16 who now lives near Northallerton, said: "It is an amazing gesture by English Heritage.

"They have done a tremendous job in opening up a part of the castle which hasn't been seen for years."

Malcolm Brocklesby's uncle, Bert, was also among those incarcerated at the castle.

"A living garden seems a fitting memorial," he said after making the trip north from Leeds to attend the opening ceremony on Tuesday.

He said: "I don't know if he was a gardener himself but at the very core of his being was his belief in life and that it was inadmissible to kill. This is a peaceful place and I think he would have approved."

Chairman of English Heritage, Sir Neil Cossons, added: "Neil Swanson's design adds a new layer to Richmond Castle, which is appropriate and respectful of its rich and vibrant history. From today, visitors will have the pleasure of watching the garden mature and local community and school groups of using its enhanced performance space.