What questions should you ask when visiting an activity provider? 

The Poole Family information directory has guidance for parents about questions to ask when looking for a club or activity for their child, which can be found here poolefamilyinformationdirectory.com

The NSPCC runs the Child protection in sport unit which has a web site with a lot of useful information for sports clubs and for parents.  Information can be found at cpsu.org.uk