A fairly significant % of Christians, at least in the USA but I would imagine the UK too, believe in alien visitation and alien abduction -- and that they're actually demons. One realization I've had recently, is that the simultaneous rise of the alien abduction/visitation phenomenon, and the Satanic panic, both peaking in the late 1980s and early 1990s, is likely related in some way; both involve repressed memories of fantastic sexual violation in physically impossible circumstances by supernatural beings.