Hollywood actor Samantha Morton spoke movingly at an event for the Internet Watch Foundation on Tuesday night, where she called on the Government to take steps to better protect children online.
The Internet Watch Foundation partners with Childnet International and SWGfL in the UK Safer Internet Centre (UKSIC).
IWF wants to help young people stay safe online by making sure you know what to do if you accidentally see sexual images or videos of someone you think might be under 18.