Teach the cubs how and why we might need to contact helplines such as Childline and the Police non-emergency number
Info about childline - http://www.childline.org.uk/pages/about.aspx
Info about Police 101 - http://www.police.uk/contact/101/
Tell the children what Childline is and how and why they might use it. Use info provided on their website. Make sure children know how they can contact Childline - phone, 1-2-1 chat (like msn) email etc.
Explain when the Police non-emergency number should be used.