Supporters of Guantanamo prisoner Omar Deghayes will create a huge sculpture to draw attention to his plight.

Mr Deghayes, a Libyan national who lived with his family in Brighton for 15 years, has been held in the Cuban detention facility for more than four years without trial or charge.

Save Omar campaigners will use 1,740 stones - one for each day he has been detained - to mark out his prison number, 727, on Brighton beach on Saturday.

Campaigner Sue Williams said: "Like all good landscape art we will respect the environment so no stones will be removed from the beach.

"In turn, we ask people walking on the beach to respect our sculpture and, if they wish, to add a stone a day so that the sculpture becomes a way of marking the time Omar has lost in a prison."

Abubaker Dehayes, Omar's brother, said: "People in Brighton have stood by my brother, shown compassion and a sense of justice. I hope that the Foreign Office and Home Office will do the same."

The sculpture will be built between the two piers from 2pm to 4pm.