Cryonics UK

Cryonics UK is a British nonprofit organization that provides SST services. It was founded by Alan Sinclair and his wife Sylvia Sinclair in 1989. Cryonics UK is the operating name of the Human Organ Preservation Research Trust, a registered charity since 1991.​

In May 2013, Cryonics UK perfused Sylvia Sinclair and sent her to the United States where she was cryopreserved by the Cryonics Institute. In 2016, Cryonics UK perfused "JS", a British 14-year-old girl, and sent her to CI.