Channel 4 says it is treating allegations linked to “Married at First Sight” UK very seriously, with two reviews under way, but has not said whether the programme could be cancelled. The issue matters because the series is one of the broadcaster’s most popular shows and has renewed scrutiny of welfare protections for reality television contributors.

A “Panorama” investigation earlier this year alleged that two contestants were raped and another experienced a non-consensual sex act during the show. Channel 4 executives also defended ongoing welfare processes for programmes such as “Virgin Island”, saying contributors are supported by experts and retain control over their participation; separately, the broadcaster said it must differentiate itself from streaming rivals and is seeking a new director of programmes.