Internet Matters is an independent, not-for-profit organisation to help parents keep their children safe online. www.internetmatters.org
The following link includes a step-by-step guide to getting parental controls set up: www.internetmatters.org/controls/interactive-guide/
Other websites to visit are:
Kidsmart - www.kidsmart.org
Think u Know? - https://www.thinkuknow.co.uk Think u Know provides a guide to internet safety and safe surfing for young people.