Here's some important documents for all Helpers. Keep them on hand, either download and print out, or have on your phone - but note that if you're a Lighthouse Keeper or Lamplighter you shouldn't be using your phone when you're looking after the children:
HELPERS' HANDBOOK (A5 version)
HELPERS' HANDBOOK (booklet version)
SAFEGUARDING - INFORMATION FOR HELPERS
(A5 version)