Police have revealed an extensive security package intended to ensure safety at the London olympics.

The Metropolitan Police's head of special operations, Assistant Commissioner Tarique Ghaffur, announced £600m worth of measures at a conference in Abu Dhabi.

He said the police are planning to co-ordinate London's half a million existing CCTV cameras, and scan the crowds using state-of-the-art identity recognition techniques.

Further monitoring will be carried out by three helicopters.

Also planned are an automatic vehicle number-plate recognition system and biometric checks for the 40,000 workers who will be employed in constructing the olympic park.

The measures will be in place for a 60-day period around the games.

Mr Ghaffur announced that tickets will be linked to the identity of the buyer, and that the holder will be remotely tracked from their home to the venue.

The games are considered a target for potential terrorists.

Organisers are expecting nine million people to watch the games at 33 venues across London. In addition, London can expect 15,000 athletes and 20,000 media workers.