"From: Les in Chorlton
Date: 20 Nov 13 - 01:40 PM
One teacher, one parent and 30 children?"

Just in case you're planning a morris event here's the relevant part of the Leicestershire CC guidance on trips and visits. As you will know it's usual to adapt existing templates when writing risk assessments so here's one to help you plan.

DAY VISITS

The following ratios* should be considered the minimum for off site day visits: For example visits to local hostelries or for local processionals in normal circumstances.

Years 1 to 3 of dancing - a ratio of 1:6 (1 adult to 6 morris dancers)
Years 4 to 6 a ratio of 1:10 - 15 (1 adult to 10 - 15 morris dancers)
Year 7 onwards a ratio of 1:15 - 20 (1 adult to 15 - 20 morris dancers)

(*These ratios are based not on increasing reliability/carefulness of dancers but on a policy of encouraging natural culling of older dancers by acts of god.)

RESIDENTIAL VISITS and TOURS

For all residential visits and tours, at home or abroad, a good rule of thumb is 1 adult to 10 morris dancers.