Insurance

Make sure you have adequate insurance if:

your event involves taking people on a trip, for example from an inner-city to the seaside in a minibus (trip/travel/vehicle insurance)
you are inviting schoolchildren in to see your centre or providing work experience. You may need public liability insurance, but the local education authority will help you with this
you are uncertain about your own level of personal insurance and that of other volunteers

You can check out insurance through your local council: ask for the Education Department for schools or Social Services for Disabled/Elderly Care homes. Their staff are used to advising on this and will be pleased to help you.