Net Aware
An online guide for parents about social media, apps and games from the NSPCC and O2

Think u Know
Website with sections for children of different ages as well as parents about staying safe online

Child Net
A non-profit organisation working to make the internet a safer place for children. Lots of information and resources.

Safer Internet Advice Centre
Advice and resources to help children stay safe online; section for children and for parents

NSPCC Online Safety
Online safety information from the NSPCC

Internet Matters
Website for parents about keeping children safe online