BEST AGENCY TRACKING

terrorists is not a government agency but a private law firm.

Yet on the third floor of a glass office building overlooking the Cooper river is a locked room that is straight out of a futuristic thriller.

Inside, a series of control panels with flashing lights and whirring hard drives comprise the master computer of the world’s largest free-standing database of intelligence on Islamic terrorism. It could hold the key to dismantling Al-Qaeda.

“It’s the best database on Islamic terrorism in the world,” said a senior counter-terrorism official at the FBI.

The database is the pivotal tool in what those involved say will be the biggest class action in history: a $1 trillion lawsuit on behalf of the families of 1,431 of the people killed on 9/11 and 1,325 of the injured.

More than 100 of the clients are British. Yet while investigators building up the database have received government help in 19 countries, from Afghanistan to Syria, they have had none in Britain, according to Ron Motley, the lawyer behind the action.

“We’ve had zero co-operation from the UK,” said Motley, who works from an enormous yacht named Themis after the Greek goddess of justice. “They just don’t want to help their own citizens.”