Key Takeaways

  • Yes. Thailand and the UK apply the extradition treaty signed in Bangkok on 4 March 1911 and ratified in London on 1 August 1911.
  • The treaty lists 31 crimes. Under Article 2, extradition for other crimes, such as drug offences, is at the requested state’s discretion.
  • Under Article 3, either country may refuse to surrender its own nationals, at its absolute discretion.
  • Herrera & Partners (H&P) has assisted foreigners in Thai extradition, deportation and Interpol notice proceedings for the last decade.

Thailand extradites to the United Kingdom. Every UK request is governed by the 1911 treaty between the United Kingdom and Siam, read together with Thailand’s Extradition Act B.E. 2551 (2008).

Surrender is decided in Thailand. The Criminal Court rules on the legal conditions, and the Thai government makes the final decision once any appeal is over.

Does Thailand Have an Extradition Treaty with the UK?

The Treaty between the United Kingdom and Siam respecting the Extradition of Fugitive Criminals was signed in Bangkok on 4 March 1911. Ratifications were exchanged in London on 1 August 1911, and the UK published it as Treaty Series 1911 No. 23.

It stays in force until either country ends it with 6 months’ notice (Article 17).

On the UK side, Thailand is a category 2 territory under the Extradition Act 2003. The UK government lists it as a “Type B” territory, which means Thailand must supply prima facie evidence when it asks the UK to extradite someone.

On the Thai side, the Extradition Act B.E. 2551 applies to UK requests wherever it is consistent with the treaty (Section 4). The Attorney General is the Central Authority that coordinates them (Section 5).

ArticleSubjectWhat the 1911 treaty provides
2Extraditable crimes31 listed crimes plus participation in them; other crimes at the requested state’s discretion if both laws allow
3Own nationalsEither government may refuse to surrender its own subjects, at its absolute discretion
4Prior proceedingsRefused if the person was already tried, discharged or punished for the same crime, or is still on trial for it
5Political offencesRefused if the offence is political or the request aims to punish a political offence
6Rule of specialityThe person can only be tried for the crimes for which extradition was granted
7The requestA warrant and evidence that would justify arrest had the crime been committed in the requested state
11Evidence and timingEvidence must justify committal for trial; no surrender until 15 days after committal
13Deadline for evidenceRelease if sufficient evidence isn’t produced within 2 months of arrest, unless more time is allowed

Countries without a treaty use a different route. Under Section 9 of the Extradition Act, extradition is possible where the requesting country undertakes to grant extradition in the same way, a reciprocal commitment between the two states, and Section 8 routes such cases through diplomatic channels. The other legal conditions under Thai law still apply, including dual criminality and the 1-year threshold (Section 7).

Which Offences Lead to Extradition from Thailand to the UK?

Article 2 lists 31 crimes. They include murder, manslaughter, assault occasioning actual bodily harm, forgery, embezzlement, obtaining money by false pretences, fraud by a banker, agent, trustee or company director, rape, kidnapping, burglary, robbery with violence and arson.

Participation in a listed crime is also covered, provided both countries punish it.

Some offences common in modern UK requests, drug trafficking among them, aren’t on the 1911 list. Article 2 covers them through its last paragraph: the requested state may grant extradition “at the discretion of the State applied to” for any other crime that both countries’ laws allow.

Thailand’s own threshold applies on top. Under Section 7 of the Extradition Act, the conduct must be a crime in both countries punishable by 1 year of imprisonment or more.

Recent UK requests include drug cases:

  • Richard Wakeling was sentenced in his absence to 11 years in April 2018 for attempting to import liquid amphetamine into the UK. He was arrested in Bangkok in February 2023 and returned to the UK in June 2023, where he was jailed.
  • In September 2024, Thai police arrested a British man in Phuket wanted for conspiracy to supply Class A drugs, on a Criminal Court warrant. He was handed to prosecutors to pursue extradition.

How a UK Extradition Request Moves Through Thailand

  1. Provisional arrest. In urgent cases, the UK can apply for provisional arrest before the full file arrives (Article 9). The application must prove that a UK warrant or sentence exists and state the nature of the offence.
  2. Deadlines for evidence and court filing. The treaty releases the person if sufficient evidence isn’t produced within 2 months of arrest, unless more time is allowed (Article 13). Separately, Section 16 of the Extradition Act requires the extradition case to reach the court within 60 days of arrest, or within a period the court fixes of up to 90 days.
  3. The request and documents. The request goes through diplomatic channels with a UK arrest warrant and evidence that would justify arrest had the crime been committed in Thailand (Article 7). Sworn depositions and warrants are admitted as evidence if properly authenticated (Article 10). Documents are translated into Thai (Section 8).
  4. Criminal Court hearing. A public prosecutor brings the case (Section 18). The person is detained during the hearing but can petition for provisional release (bail), and the court must ask the prosecutor whether it objects. The court appoints a lawyer if the person has none.
  5. The court’s test. Under Section 19, the court orders detention for surrender only if the person is the one sought, the evidence would justify a trial had the offence been committed in Thailand, and the offence is extraditable and not political or military. Article 11 of the treaty sets the same evidential standard.
  6. Appeal. The prosecutor or the person can appeal to the Court of Appeal within 30 days of the order. The Court of Appeal’s decision is final (Section 21).
  7. Government decision and surrender. The treaty bars surrender until 15 days after committal (Article 11), and Section 20 of the Act bars it for 30 days after the final detention order. The Thai government then considers surrender, which must take place within 90 days unless the court extends the period (Section 22).
  8. Deferred surrender. If the person is under examination for another crime in Thailand, surrender waits until that trial and any sentence are complete (Article 4; Section 24).

A person can consent to extradition at any stage. Consent given before the court can’t be revoked (Sections 27 and 28).

“Extradition is not automatic, even where a treaty exists. Each request must satisfy the applicable treaty requirements and Thai law, with the Criminal Court assessing the evidence before making its final decision.” explains an experienced extradition lawyer at Herrera & Partners.

When Thailand Can Refuse a UK Request

The 1911 treaty and the Extradition Act set out the grounds on which surrender is barred or may be refused:

  • The person was already tried and discharged or punished for the same crime, or is still on trial for it (Article 4).
  • The offence is political, or the request was made to punish a political offence (Article 5). Under Section 9 of the Act, attacks on the King, Queen, Heir Apparent or a head of state don’t count as political.
  • The evidence isn’t sufficient to justify committal for trial under Thai law (Article 11; Section 19).
  • The offence isn’t a crime in both countries, or carries less than 1 year of imprisonment (Section 7).
  • There are substantial grounds to believe the person would face torture, cruel or degrading treatment, or enforced disappearance (Section 13 of the Prevention and Suppression of Torture and Enforced Disappearance Act B.E. 2565).

Under Article 7, a sentence passed in the person’s absence (“in contumaciam”) doesn’t count as a conviction, and the person may be dealt with as an accused person.

Can Thai Nationals Be Extradited to the UK?

Yes, but Thailand isn’t obliged to surrender them. Article 3 lets either government refuse to deliver up its own subjects “at its absolute discretion.”

Section 12 of the Extradition Act allows the extradition of a Thai national in 3 situations: where a treaty provides for it, where the person consents, or under reciprocity. The Criminal Court checks nationality as part of its Section 19 test.

If Thailand refuses, Section 25 of the Act asks the Central Authority to consider prosecuting the person in Thailand instead.

When Thailand Asks the UK: Requests in the Other Direction

The treaty works both ways, and requests from Thailand go through the UK Extradition Act 2003. As a Type B territory, Thailand must provide prima facie evidence. After a provisional arrest in the UK, it has 65 days to send the full request, longer than the standard 45 days.

Lee Aldhouse (2012). A British kickboxer accused of stabbing a former US Marine in Phuket in August 2010 lost his appeal before the UK High Court and was sent to Thailand. Thai police described it as the first UK approval of a Thai extradition request in 101 years. He was later sentenced to 25 years.

“London Rose” (2014). Thai police sought a British citizen in London on lèse-majesté charges. The British Ambassador said extradition wasn’t possible because the UK has no lèse-majesté offence and extradition treaties only cover offences in both states.

Yingluck Shinawatra (2018). Thailand’s government said it had asked the UK to extradite the former Prime Minister, sentenced in her absence to 5 years over a rice subsidy scheme. The Crown Prosecution Service said it neither confirms nor denies extradition requests until a person has been arrested.

Facing Extradition from Thailand to the UK

Deportation is a second route back to the UK: Thai Immigration can revoke a foreigner’s permission to stay and remove them. In May 2025, a British man convicted of fraud in the UK was arrested on Koh Samui; his permission to stay was revoked and he was treated as a prohibited person, according to Khaosod English.

Requests for evidence travel on a separate track under the UK-Thailand mutual legal assistance treaty, in force since 1997. These often come before any extradition request.

A UK Interpol Red Notice is often the first visible step, followed by a provisional arrest request. From that arrest, the evidence deadlines start running.

For a review of a UK request against the 1911 treaty and the Extradition Act, contact Herrera & Partners in Bangkok.

Frequently Asked Questions

Can a British citizen be extradited from Thailand to the UK? Yes. Article 3 only lets each country refuse its own nationals. A British citizen in Thailand can be surrendered once the Criminal Court finds the Section 19 conditions met and the Thai government approves.

How long does extradition from Thailand to the UK take? Each stage has its own deadline, including 30 days to appeal and 90 days to surrender. Recent cases took about 4 months (Wakeling, 2023) and 9 months (Cash, 2025 to 2026) from arrest to return.

Does Thailand extradite to the UK for drug offences? Yes, although drug offences aren’t among the treaty’s 31 listed crimes. Article 2 lets Thailand grant extradition at its discretion for other crimes that both countries’ laws allow.

Can someone sentenced in absence in the UK be extradited from Thailand? Yes. Article 7 says a sentence passed in absence isn’t treated as a conviction, so the person may be dealt with as an accused person. Richard Wakeling was returned in 2023 after a 2018 sentence in absence.

Can a Briton convicted in Thailand serve the sentence in the UK? Possibly. A separate UK-Thailand treaty on the transfer of offenders, signed in Bangkok on 22 January 1990 and in force since 6 February 1991, allows sentenced prisoners to be transferred, subject to its conditions.

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