European arrest warrants: how they work and what Brexit changed

A European arrest warrant, often shortened to EAW, is a request from a judicial authority in one European Union state for a person to be arrested and handed over by another. It is meant to replace slow, politically tinged extradition with a quicker, court-to-court process. The United Kingdom took part from 2004 until Brexit, and since then its dealings with EU states have run on a different legal footing.

What a European arrest warrant is

The scheme comes from a Council Framework Decision adopted in 2002. It rests on mutual recognition: each member state agrees to treat the decisions of another state's courts as largely trustworthy. Traditional extradition often involved ministers and diplomatic exchanges. Under the warrant system, decisions are taken by judicial authorities alone, and the executive plays no part.

A warrant can be issued for two purposes: to prosecute someone who is accused of an offence, or to enforce a custodial sentence or detention order already imposed. The system speaks of surrender rather than extradition, a deliberate change of vocabulary to signal a more streamlined, less political procedure.

How the process works

Issue and arrest

A court or prosecutor in the issuing state completes a standard form. It sets out the person's identity, the offence, the sentence imposed or available, and the circumstances of the alleged conduct. The warrant is then circulated to other states, often through shared law-enforcement databases or through Interpol. Once the person is found, the police in the executing state arrest them and bring them before a court.

The hearing

The person can consent to surrender, in which case the process is usually completed within days or weeks. If they contest it, a court examines the warrant and any grounds for refusal. Those grounds are deliberately narrow. The court is not asked to decide whether the person is guilty, and it does not weigh the evidence in the way a trial court would.

Time limits

Strict deadlines apply. The framework sets a period of 10 days for a final decision where the person consents. Where they do not, the aim is a decision within 60 days of arrest, with a possible extension of 30 days. Surrender should then follow within a short, fixed window. In practice delays still occur, particularly where there are appeals.

Offences, safeguards and refusals

For a list of 32 categories of serious offence, including terrorism, trafficking in human beings and murder, the executing state does not check whether the conduct is also a crime under its own law. For other offences, that check, known as dual criminality, can apply. Lesser offences are screened by minimum penalty thresholds.

Courts can refuse to execute a warrant on specified grounds. These include a person having already been finally judged for the same acts, the person being under the age of criminal responsibility in the executing state, and a risk to fundamental rights. Proportionality has also become a live issue. Warrants for minor alleged offences were criticised for putting heavy demands on police and courts, and issuing states were encouraged to consider whether a warrant was justified in the circumstances.

What Brexit changed

The EAW is a mechanism for EU member states, so the UK could not keep it once the transition period ended on 31 December 2020. Instead, the EU-UK Trade and Cooperation Agreement created a separate surrender regime that has operated since 1 January 2021. Warrants issued before that date, where the person had not yet been arrested, are treated as warrants under the new arrangements.

The new regime is modelled on an earlier agreement between the EU, Norway and Iceland. It keeps the core features: judicial authorities issue and execute warrants, grounds for refusal are limited, and timetables are tight. The differences are what matter most to lawyers and defendants.

The nationality exception

This is the most significant change. States may declare that they will not surrender their own nationals, or will do so only on conditions. Germany and Austria are among those that have taken this approach, and others attach conditions. Where a state refuses on this ground, the agreement requires it to consider prosecuting the person itself, taking account of the views of the state that issued the warrant. The UK still surrenders its own citizens, and the arrangements allow reciprocity.

Loss of shared tools

The UK also lost access to the Schengen Information System, the EU database through which warrants were rapidly circulated. EU states may now rely more on Interpol channels or direct contact when seeking someone believed to be in the UK. UK law has also been adapted so that police can make arrests on a request from certain countries before a domestic warrant is issued.

Why it matters

Before the warrant scheme began, the UK extradited fewer than 60 people a year. Over the life of the EAW, more than 10,000 people were surrendered from the UK to other member states. The change in 2021 did not return the UK to that earlier world, because the new arrangements remain far faster than conventional extradition. But the nationality exception and the loss of automatic database alerts mean outcomes can differ depending on the country involved.

For anyone facing a cross-border request, the legal route now depends on where they are and which state is asking. A person arrested in France on a Spanish warrant is dealt with under the EAW. A person arrested in France on a British warrant is dealt with under the Trade and Cooperation Agreement. The arrangements are subject to review, and states can change their notifications, so specialist legal advice is essential in any live case.