BBC Own It 
Gives support for young people to take control of their online life, including help and advice, skills and inspiration on topics such as friendships and bullying, safety and self-esteem.

Childline 
This includes information for young people on sexting, gaming, grooming, bullying, porn and relationships.
 

Internet Matters 
A not-for-profit organisation set up to empower parents and carers to keep children safe in the digital world. Their support for parents includes a range of downloadable guides covering subjects such as transition to secondary school, Vlogging & livestreaming, online gaming and cyberbullying. 

NSPCC
Includes a range of resources to help parents keep children safe when they’re using the internet, social networks, apps, games and more.