Bold Seagull
strong and stable with me, or...
and when the trip is in the afternoon, and the kids want to take off their teeshirt at the beach?
School trip you'd already have a permission letter and a list of things they should bring, informing parents they should apply sun cream in the morning, and the children should carry their own. Most brands of sun cream now do 6 and 8 hour protection. You'd have done a risk assessment, and you'd have a certain number of helpers per child. You'd have probably stated that kids need a sun hat and suitable clothing. As a teacher, I doubt you are letting them take t-shirts off.