The Lib Dems are calling for a new system of age ratings for social media platforms.

Just as films are rated according to their content, they believe online platforms should be rated according to the risks they pose to children.

MP for Esher and Walton, Monica Harding says too many platforms expose young people to addictive design and harmful content.

With too little accountability from the companies involved, Harding is urging constituents to sign an on-line petition to back the initiative.