UK and German police will be working in both countries during the World Cup to try and ensure security, but what powers and measures will they use?
German and UK officers are working together in both countries
More than 3,300 people are banned from travelling to Germany. How?
They are subject to Football Banning Orders (FBOs) that prevent "risk supporters" in England and Wales travelling to football matches abroad.
The orders are one of the security measures being used for Germany 2006.
They were introduced in July 2000 after violence at Euro 2000 when 945 English people were arrested after trouble and UEFA threatened to expel the team from the tournament.
Magistrates can impose them after a football-related offence conviction or a police complaint if the court is satisfied the person has contributed to violence or disorder and the order would help.
How do they work?
Banning orders last two to 10 years, depending on the severity of the case. When they are running out, they are assessed and another can be imposed.
People have to surrender their passports to police for a designated period of time - this time from 30 May to 9 July, when the World Cup finishes. They also have to go to the police station on every England match day - there are three of these so far in the group stages.
The UK is the only participant to have this kind of power.
What happens if people fail to comply?
Police are trying to track down those who failed to hand in their passports. In the week before the tournament began, about 5% of them had not been handed in - about 200 people. Anyone who fails to comply is arrested and taken to court.
If convicted the penalty can be 6 months imprisonment, a fine of up to £5,000 and a further banning order.
Police are checking passengers at all ports
Who is working in the UK?
Germany has regional and national forces and has sent six of their federal officers to the UK. Two are working at northern ports, two in the south and two in a control centre with UK police.
They will stay until England return from the World Cup. They have no powers of arrest and are here in an intelligence and advisory role.
UK police have extra staff at airports, sea ports and Eurostar terminals. They are picking people out according to a profile of potential trouble makers.
They scan their passports and have the powers to arrest them and refer them to the courts if their previous criminal history, for example of violent disorder, suggests they could cause problems in Germany.
Who is in Germany and mainland Europe?
More than 80 British police officers will be in Germany and transit countries for as long as England are in the tournament, 48 of them in uniform and 34 in plain clothes as "spotters".
The uniformed British officers working with German Federal police at airports and on the transport system will have same the powers as German police officers, but those working in venue cities will not.
What happens to English people falling foul of the law in Germany?
For the first time, a team of four prosecutors from the Crown Prosecution Service will go to Germany to gather evidence to be used in English courts. It is following England from Frankfurt to the venue cities for subsequent games.
Those appearing in court in Germany will be arrested when they touch down on UK soil, and taken to court. Prosecutors in the UK will then apply for banning orders to be imposed.