My initial thoughts are definitely, yes. Anybody working with children or vulnerable adults, whether paid or voluntary, should be cleared by a CRB check.
If a job (paid or unpaid) falls within one of the categories of regulated position then it is classed as working with children. Regulated positions include:
* Any employment in schools, childrens� homes, day care premises where children are present
Caring for, training, supervising or being in sole charge of children
Unsupervised contact with children
* Other positions which give the kind of access or influence which could put children at risk if held by a disqualified person (eg management committee members)
Organisations are likely to fall into the definition of working with children include those which:
* Run youth clubs
Organise or arrange facilities or activities for children
Offer counselling to children
Run out of school play clubs
* Run play groups
So your people may not have unsupervised contact with the children in their role, but they reasonably could do and nobody would think it odd if they did.
I would strongly recommend your organisation carries out these checks.