Paedophile Geoffrey Portway will be deported from the US to Britain at the end of his jail sentence, which will be between 18 and 27 years.
Portway, who was born in Spain, possessed more than 20,000 images and videos of children being abused.
In recovered online discussions, he described his home-made dungeon as a place he intended to keep kidnapped children, sexually abuse them, murder them and then eat them.
More top news
Facebook has completed its first test of a solar-powered drone that carries internet signal in the skies above the UK.
Russia goalkeeper Igor Akinfeev has thanks fans for their support after he was struck by a flare thrown during a qualifier in Montenegro.
Astronauts arriving for their new mission hug the crew on arrival at the International Space Station.