MARRIED At First Sight UK has been rocked by allegations of sexual assault and misconduct, a BBC Panorama documentary has revealed.

The bombshell claims are made in the documentary The Dark Side of Married at First Sight which airs tonight at 8pm on BBC One.

The programme, fronted by BBC News culture correspondent Noor Nanji, features three female contestants who allege sexual misconduct by their former on-screen husbands.

Two of the women claim they were sexually assaulted during their time on the popular Channel 4 show, according to the BBC.

However, the men deny all the allegations against them.

The BBC warned that the investigation raises serious concerns that welfare procedures on the hit reality series have failed contributors, leaving vulnerable participants at risk of harm.

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Channel 4 and CPL – the independent production company that makes the series – have said that the welfare protocols are robust and comprehensive.

The identity of the men and women are at the centre of the investigation are not known, reports Broadcast.

In a statement, Channel 4 said: “We have not seen the programme and will comment when we know more.”

Married at First Sight UK is a reality television experiment where singletons agree to marry total strangers, matched entirely by a panel of relationship experts.

It originated in Denmark in 2013 and reached the UK in 2015, where 10 series have so far aired.

There are over 35 versions of the show around the world.

The series swaps traditional dating for extreme commitment, forcing couples to dive straight into a lavish wedding reception and a high-pressure honeymoon.

Upon returning to reality, the newlyweds move into a communal apartment block.

They then attempt to navigate living together while their relationships are scrutinised by fellow contestants.

Guided by a panel of relationship specialists, the participants undergo intensive therapy sessions and challenges designed to fast-track emotional intimacy.

The social experiment ends with the final vow renewals, where the remaining couples must decide if their televised romance has a genuine future in the real world.