WHEN 21-year-old Madison Sarah uploaded a new lifestyle vlog to YouTube from her bedroom in Manchester, she was hoping for comments about how pretty she looked.

Instead she was branded "a disgusting f**king w***e” and threatened.

Her crime? Dating musician boyfriend Paddy, who is black.

And she's not the only British woman to face such vile trolling.

In fact a Sun Online investigation has found an alarming rise in racist abuse, aimed at relationships between white women and black men.

These disgusting trolls have dubbed themselves the coal patrol because they are trying to stamp out "coal burners" - their name for white women who date black men.

The term comes from the vulgar idea that a woman "uses black coal to keep her hot".

Shockingly, in an increasingly multicultural Britain, in which seven per cent of couples in England and Wales are interracial, a growing number of young women are facing such abuse.

The issue came to light this week when model Iskra Lawrence, 28, revealed that she'd been the victim of "hate and racism" over her boyfriend, American musician Philip Payne.

Much of this abuse is hidden via internet message boards, but experts who have analysed the posts say the authors are white men aged 16 to 24, who "want to protect women".

These white males see themselves as being "superior" to black men and believe white women are "degrading" themselves by having relationships with them.

‘This w***e needs coal patrolled’
With lighthearted videos on everything from shopping to relationships it’s obvious why Madison Sarah Knowles, who is from Manchester, has amassed 130,000 subscribers, many of whom are other young women.

The model regularly posts shopping hauls from affordable stores such as Pretty Little Thing, but is best known for sharing an insight into her life with on-off boyfriend Paddy, an influencer and Soundcloud rapper.

However, her social media fame has come at a cruel price.

She has received abuse which has been coordinated on controversial website 4Chan then moved to YouTube, where trolls down-vote the women's videos and post comments accusing them of ‘race betrayal’.

Sick slurs aimed at her include: “This w***e needs coal patrolled [sic]".

“What a disgusting f**king w***e,” another user posted, while they began a campaign to get 200 dislikes on her video.

Instantly her comments section was flooded with messages, with one user threatening: “Stay away from him if you know what’s good for you.”

Another wrote: “The toll must be paid” and “Burn the coal! Pay the toll!”

The "toll’' is to make YouTubers delete their accounts.

Responding to one comment, Madison addressed their racist remarks, saying: “There is no place in this world for this type of racist hatred, your comments are derogatory and insulting.”

And while Madison’s account is still active, sadly, some YouTubers have been forced offline by the trolls' campaign.

‘Coal burners will get the rope’
Another YouTube couple, Alyssa and Charles, who have nearly 90,000 subscribers, have seen their account ‘raided’ by the ‘coal patrol’ on their video entitled “Ignoring my boyfriend.”

Shockingly, online trolls are even threatening white women, like Alyssa, with hanging saying, “Coal burners will get the rope”.

The abuse didn’t go unnoticed by the couple’s fans, with one jumping to their defence and commenting: “These are the most racist comments I’ve ever seen!”

Megan Moxy, another YouTuber was targeted earlier this month over her relationship with boyfriend Lathan, with one user saying “Once you go black we don’t want you back”.

‘Let's get her to commit suicide'
Glamorous Cassie Standy from North Carolina faced a barrage of negative comments after posting a makeup tutorial video with her boyfriend, Christopher.

In one online thread discussing Megan and Cassie, one 4Chan user chillingly asks: “Can we get one of them to commit suicide?”

“Kill them both” another person commented.

While most people would be horrified to hear of this abuse, this sort of targeting isn't restricted to dark corners of the web.

Worryingly, Home Office stats show hate crime rose by 17 per cent in the last year but women like Iskra Lawrence aren't willing to be cowed.

She posted in response to the toxic comments: "Love is love no matter what controversy we may face, our love will light up any dark place".