Channel 4's controversial late-night show which follows couples as they experiment with opening their relationships to non-monogamy is filmed in a £15million mansion that once played host to Queen Elizabeth it has been reported.
Open House: The Great Sex Experiment sees couples spend two nights at a mansion where they meet a sex and relationship expert then hook up with couples and singles who don't follow society's rules about monogamous relationships.
The location for filming has been kept a secret, but MailOnline reports it is a country house in Herefordshire.
The house is set in a 1200-acre estate in the village of Much Dewchurch. Speaking to MailOnline, one local, who didn't want to be named, said: "I know camera crews have been there a lot but I assumed it was the Antiques Roadshow or something to do with the history of the building.
"The Queen held a garden party there once but that was before the new people took over."
The 15th century house is also home to pheasant shoots and fishing. Its swimming pools, large rooms, yurts and a hot tub all feature in the Channel 4 show, where couples open their re; relationships to have sex with other people.
Channel 4 and Firecracker Productions have always declined to reveal the location of the filming and no-one involved with the house has commented on MailOnline's report.
