BANNED football yobs intent on causing trouble at Euro 2006 have been warned that police will stop them leaving the UK.Essex Police's Special Operations Chief, Insp Tim Stokes, said: "If you are going to travel abroad with the intention of causing trouble, you will be turned back.

BANNED football yobs intent on causing trouble at Euro 2006 have been warned that police will stop them leaving the UK.

Essex Police's Special Operations Chief, Insp Tim Stokes, said: "If you are going to travel abroad with the intention of causing trouble, you will be turned back.

"In Essex there will be a high level of policing concentrated around the games, ensuring that people who want to enjoy the football can do so in peace."

A spokesman for BAA Stansted Airport said that although there would be special football-related promotions throughout the duration of the tournament staff would co-operate fully with police in their efforts to stop hooligans flying.

"We are aware they will be doing checks and liaising with the airlines, and also checking passenger lists.

"We will support the police activities, especially in ensuring the fans do behave while at the airport.

"We want it to be an enjoyable occasion but equally we do not want undesirables travelling."

A spokeswoman for Harwich international Port said: "We will co-operate with the police with any measures they need to take to make sure hooligans do not use our services to travel abroad during the tournament."

The Home Office yesterdayunveiled plans for its security operation to prevent hooliganism by England fans at Euro 2004.

Some 60,000 England supporters are expected to travel to Portugal for the tournament which starts on June 12.

A massive surveillance operation of ports and airports will aim to stop potential troublemakers from leaving the country.

A total of 2,100 people have already been ordered to hand in their passports in the week leading up to the tournament kick-off.

Police are gathering evidence on up to 400 others that they would like to bar from travelling.

Tens of thousands of England fans are expected to stay on the Algarve and commute to England's group games against France in Lisbon on June 13, Switzerland in Coimbra on June 17 and Croatia in Lisbon on June 21.

Fans have been urged to book their place on "football special" trains which will carry them around the country to matches.

There will be no alcohol on sale on the trains, which can carry up to 1,000 fans, but people can take their own on board.

Kevin Miles, international co-ordinator of the Football Supporters' Federation, said: "We have spent months negotiating with the Portuguese railway authorities and persuaded them to put on these special trains to take England fans from various start points to the group games in Lisbon and Coimbra.

"We are hearing that so far take-up has been slow and we think that's because people haven't heard enough about them.

"If people log on to www.footballsupportersinternational.com there is a link through which they can book their tickets, in English, online.

"They will need their passport number and bookings must be made eight working days in advance.'