The claim that the UK, as a sovereign state, can choose whether or not to sign extradition treaties is accurate as a general statement about UK sovereign treaty-making power. Evidence: 1. The UK government's own guidance confirms that "Under multilateral conventions and bilateral extradition treaties the UK has extradition relations with over 100 territories around the world." The UK maintains a published list of bilateral extradition agreements with countries including the United States, Brazil, the Philippines, Iraq, the UAE, and many others, each voluntarily negotiated and signed by the UK. 2. The Extradition Act 2003 (and previously the Extradition Act 1989) provides the legislative framework for implementing extradition treaties through Orders in Council. Treaties include termination clauses — for example, the Brazil-UK extradition treaty allows either state to terminate by giving notice through diplomatic channels, demonstrating that participation is voluntary. 3. Even where no formal treaty exists, the Secretary of State can decide whether to enter into "special extradition arrangements" with a particular territory, further underscoring the discretionary nature of the UK's engagement. 4. Nuance: At the time of the interview (December 2011), the UK was an EU member, and extradition between EU member states was governed by the European Arrest Warrant (EAW) system. However, the UK had itself opted into the EAW, and retained full sovereignty over extradition arrangements with non-EU countries. The claim as stated remains accurate. Sources: - UK Government, "Extradition: processes and review" — https://www.gov.uk/guidance/extradition-processes-and-review - UK Government, "Mutual legal assistance and extradition: treaty list (accessible version)" — https://www.gov.uk/government/publications/international-mutual-legal-assistance-agreements/mutual-legal-assistance-and-extradition-treaty-list-accessible-version - Extradition Act 2003 — https://www.legislation.gov.uk/ukpga/2003/41/data.html - The Brazil (Extradition) Order 1997 — https://www.legislation.gov.uk/uksi/1997/1176/made/data.html