"UK–Türkiye Extradition: How It Works"

What legal framework governs UK–Türkiye extradition?

Extradition between the UK and Türkiye is governed by a combination of an international convention and each country's own domestic law. There is no single simple rulebook — the framework depends on which country is being asked to surrender a person.

Both the United Kingdom and Türkiye are parties to the European Convention on Extradition (1957), an instrument of the Council of Europe. Despite the name, this convention is not an EU measure; it is a wider treaty that many non-EU states have signed. It provides the backbone for extradition cooperation between the two countries.

Layered on top of the convention is each country's national law. In the United Kingdom, extradition is handled under the Extradition Act 2003, and Türkiye is designated within that Act as a "category 2" territory — a classification that shapes how a request from Türkiye is processed by the UK courts and government. In Türkiye, international cooperation in criminal matters, including extradition, is governed by Law No. 6706 on International Judicial Cooperation in Criminal Matters.

These are the frameworks to know by name. The finer content — the precise tests, the exceptions, the standards of evidence each side must meet — is technical, it turns on the facts of the case, and it can change. Those details should be confirmed with a lawyer rather than assumed from a general guide.

Does the European Arrest Warrant apply between the UK and Türkiye?

No. The European Arrest Warrant (EAW) is an EU-internal fast-track system, and it does not govern extradition between the United Kingdom and Türkiye. This is a common and important point of confusion.

The EAW was designed to speed up surrender between EU member states. Türkiye is not an EU member, and following its departure from the EU the United Kingdom no longer participates in the EAW system either. So neither country is inside that fast-track framework for the purposes of a request between them.

That is why a UK–Türkiye request falls back on the older, broader route: the European Convention on Extradition (1957) together with each country's domestic extradition law. Practically, this means the process is not the streamlined, near-automatic surrender that people sometimes picture from EU headlines. It is a fuller process, with judicial examination and an executive decision — and, correspondingly, more points at which a lawyer can raise objections where there are grounds.

Which way is the request going — and why does it matter?

Extradition can run in either direction, and the direction determines which country's courts and which country's law take the lead. Getting this straight early matters, because it changes who you need representation in front of and what the procedure looks like.

Türkiye asking the UK to surrender someone. Here the request is examined in the United Kingdom under the Extradition Act 2003, with Türkiye treated as a "category 2" territory. A UK court considers the request, the person appears before it, and — broadly — a court stage is followed by a decision at government level. A person in this position needs UK legal representation for the domestic proceedings; a Turkish lawyer's role is to advise on the Turkish side, such as the underlying case, the record behind the request, and the position back in Türkiye.

The UK asking Türkiye to surrender someone. Here the request is examined in Türkiye under Law No. 6706 and the framework of the European Convention on Extradition. This is where a lawyer registered with a Turkish bar acts directly — attending the proceedings, examining the request, and raising objections before the Turkish court where the law allows. If you or a family member are detained in Türkiye in connection with a UK request, this is the side we can act on.

If you have been stopped or detained at the airport in Türkiye and this is unfolding right now, the immediate priorities are the same as in any detention: you have the right to remain silent and the right to a lawyer, you should not sign documents you do not understand, and someone should contact a lawyer with your location. Our guide for British nationals detained at Istanbul Airport walks through those first hours, and you can read more about the process on our extradition page.

Is extradition a court decision or a government decision?

It is both. Extradition is characteristically a two-stage process — a judicial stage and an executive stage — and understanding this dual nature explains why a case can be argued at more than one point.

At the judicial stage, a court examines the request. Its job is not to retry the underlying alleged offence but to check the request against the legal requirements and bars that apply: whether the paperwork and legal conditions are satisfied, and whether any recognised objection prevents surrender. This is the stage at which a lawyer raises the grounds discussed below.

At the executive stage, a government minister or authority makes a decision on the request, within the limits the law sets. Even where a court has found no legal bar, the executive decision is a distinct step, and in some systems there may be routes to challenge or appeal decisions made along the way.

The exact sequence, the appeal routes, and the time limits differ between the two countries and can change. Because these deadlines can be short and are decisive, they are among the details you should confirm promptly with a lawyer rather than rely on a general description.

What grounds can a lawyer argue against extradition?

A lawyer can argue that surrender should be refused on recognised legal grounds — but whether any of them applies depends entirely on the facts, and no lawyer can promise a result. The point of naming them is to show that extradition is contestable, not automatic.

Grounds that are commonly examined in extradition law include, at a framework level:

• Dual criminality — broadly, the idea that the conduct alleged must be an offence in both countries. How this test is applied is technical and fact-specific.
• The political-offence exception — the long-standing principle that extradition may be refused where the matter is properly characterised as a political offence. Its scope is narrow and heavily argued.
• Human-rights and fair-trial bars — objections based on the risk to the person's rights if surrendered, drawn from human-rights protections that apply to extradition decisions.
• Nationality, procedural, and evidential objections — including questions about how a citizen is treated, whether the formal requirements are met, and the sufficiency of what has been put forward.

We deliberately keep this at the level of the principles rather than the precise tests, because the tests, thresholds, and how a court weighs them vary and evolve. We assess each request on its facts and challenge it where there are grounds. For a fuller treatment of the objections raised in the Turkish context, see grounds to oppose extradition from Türkiye.

How does an INTERPOL Red Notice relate to extradition?

A Red Notice and an extradition are connected but are not the same thing. A Red Notice can be the trigger that leads to someone being located and detained, but the extradition itself is a separate legal process that follows.

An INTERPOL Red Notice is a request circulated to police forces worldwide to locate a person and, in many cases, provisionally detain them pending an extradition request. It is not an international arrest warrant, and each country decides for itself how to respond to it. Extradition — the formal legal request for surrender, examined by a court and decided by government — is the distinct process that may come afterwards.

So a British national might first encounter the issue as a Red Notice (for example, being flagged at passport control), and only then face a formal extradition request. The two can also be challenged separately: a Red Notice can be contested before the Commission for the Control of INTERPOL's Files (CCF), while an extradition request is contested in the courts of the country being asked to surrender.

We do not re-explain the mechanics of Red Notices here. If that is your situation, start with is a Red Notice an arrest warrant? and how to remove an INTERPOL Red Notice through the CCF, and see our INTERPOL Red Notice service page.