A mother and son have featured in a viral carpool karaoke video that is helping raise awareness of Down's Syndrome.

Nisha Soni, 36, from Bushey, has appeared in the short film alongside her four-year-old son Kush, and 49 other mums and their children.

The video uses Makaton, a form of British sign language designed to help young children and those with speech delay communicate, as they sing along to A Thousand Years by Christina Perri.

The film has already racked up more than six million views on Facebook and a 1.5m on YouTube.

The idea came from a Facebook group, "Designer Genes", which was created for parents who have a child with Down’s Syndrome born in 2013/14. However, the video was originally inspired by Singing Hands, an organisation whose videos have helped many in the group learn Makaton.

Everyone was allocated a line to lip-sync and they then sent their recordings in which was edited into a four-and-a-half minute film.

Credit: Youtube/Woudn't Change a Thing

Ms Soni, who appears around three minutes in, hopes the viral video will help change the stigma surrounding Down's Syndrome.

She said: "We want to promote what is good. The amount of love between a mother and child is phenomenal and this is no different. It doesn't have to be negative or doom and gloom. They deserve their place on Earth as much as anyone else.

"We are overwhelmed by the reaction that the video has had and gives our children the best chance of feeling included and accepted. I hope that this video has made people realise the positivity of having a child with Down's Syndrome."

World Down's Syndrome day is being recognised today.