Here are some useful E-Safety sites that will help keep your child safe online:

How to use parental controls on your home internet connection  and safety features of various social networks.
Information on how you keep children safe when they're using the internet, social networks, apps, games and more.
Information to parents on how to keep your child safe online.
Childline is a free, private and confidential service where you can talk about anything. Whatever your worry, whenever you need help, they ere here for you online, on the phone, anytime.
All the information you need to keep your child safe online
Parent Zone provide support and information to parents, children and schools, working globally to help families to navigate the internet safely and confidently.
Digital Parenting by Vodafone, helps you to get more involved with the technology that young people enjoy. It’s all about building children’s confidence and resilience.
Thinkuknow is the education programme from NCA-CEOP, a UK organisation which protects children both online and offline.
Help and advice from the BBC on how they can help you be the boss of your online life.