Teenager on mission to promote sign language enlists celebrity help

• Video report from ITV News correspondent Rupert Evelyn

A teenager from Bridgend in South Wales is on a mission to get as many people as possible to learn sign language.

16-year-old Isabella taught herself to sign so she could communicate with her brother Lucas, who has Down's Syndrome.

And to highlight World Down's Syndrome Day on Sunday, Isabella persuaded a group of celebrities to take part in a very special video.

• 13-year-old campaigns to make British Sign Language a GCSE

• Meet the teenager teaching sign language to try and combat loneliness among deaf people