'They need to die!' Nationwide consult police after angry viewers make death threats to singing sisters over their building society adverts (7 Pics)

Their ditties about family life are like Marmite - you either love them or hate them.

But some people just have to take it too far with the Nationwide sisters Flo and Joan receiving violent death threats online.

"Them two sisters singing on that Nationwide advert need to die!" read one of the tamer comments.

"Can the sisters from the Nationwide adverts please die a horrible death," raged one annoyed viewer.

"Just wanna know what brainbox was behind the singing sisters nationwide ads because I’m fully coming for blood. Never seen anything so infuriating/annoying," spat another hater.

The building society now plans to consult police in a bid to protect its stars, who are siblings in real life.

Slamming the backlash, Nationwide’s Chief Marketing Officer, Sara Bennison, has told OK! Online : “When we saw an audition tape for Flo & Joan, gut feel told us all that they were a delightfully fresh take on things like loyalty which are at the heart of Nationwide.

“Social media has provided a great instant barometer of reaction - good and bad. The huge amount of likes and shares have been great.

“But then there are others who have chosen to post the most vile, abusive and misogynistic comments about the duo. It is not just our Flo & Joan adverts that generate these comments, it is also our adverts that feature people of different colours, backgrounds and perceived sexuality, which attract the most criticism.”

Sara continued: “That’s why it is important to call out those persistent offenders who put out vile comments on a regular basis and who should really know better.

“That is why Nationwide is looking to work with other brands, industry bodies, such as ISBA, and the Met Police to look at the true scale of this worrying trend to spread hate from behind a keyboard and attempt to create a solution to tackle the issue.

“It’s one thing not to like an advert, another to threaten to kill the stars of it. Abuse is abuse and that’s never OK in our book.”

Not everyone hates their work though, with some enjoying the offerings of the musical duo.

"Wtf man I like those Nationwide adverts with the singing sisters, how can people be that upset to send death threats!? People are actually insane," remarked one, while another confessed, "upopular opinion but I really enjoy the nationwide sisters adverts."

"If I'm honest I quite enjoy the musical stylings of the nationwide sisters," admitted another.