Can I be extradited from the UK to a country that has no treaty with the UK?

Yes. The Extradition Act 2003 distinguishes between Category 1 territories (EU and Gibraltar) and Category 2 territories, but the Home Secretary retains discretion to certify extradition requests from non-treaty countries under Part 2. This means a state without a standing treaty can still make a valid extradition request to the UK, which will be assessed by the courts on its merits. The absence of a treaty creates additional procedural steps but does not provide immunity from extradition proceedings originating in the UK.