The brother of a man held in Guantanamo Bay spent two hours in a cage to highlight the plight of detainees.

Abu Bakar Deghayes, whose 35-year-old brother Omar is being held by the American military, was joined by about 20 supporters from the Save Omar campaign outside Brighton Peace and Environment Centre in Surrey Street on Saturday.

The 37-year-old, from Saltdean, Brighton, donned an orange boiler suit before climbing into a mocked-up cell that measured less than six feet by five feet.

He said: "I hope this demonstration will make people realise what my brother is going through. It is a terrible feeling to be in these cramped conditions and I don't know how someone can survive for so long in a cage like this."

Omar Deghayes, who moved with his family to Brighton from Libya in 1987, was arrested in Pakistan and has been held in solitary confinement at Camp Delta, in Cuba, since 2002. He has not been charged with any crime.

His lawyer claims his client has been tortured by American soldiers, leaving him blind in one eye.

The British Government had previously claimed it could not help Mr Deghayes because he was a British resident rather than a British national.

However, since campaigners began highlighting his case, the Government has bowed to public pressure and agreed to present the family's concerns about his treatment to US officials.