My worksheet was called "Audit Checklist" and in VBA I reffered to it as :
LearnerCount = Worksheets("Audit Checklist").Range("d2").Value

and all works fine.

I have created a userform now and wanted to amend some cells from selected
data so:

Private Sub UserForm_Initialize()
Me.CBCentre.ControlSource = "Audit Checklist!c4"
Me.CBStaffName.ControlSource = "Audit Checklist!P4"
End Sub

this caused ar error for the control source becuase it wanted:
"AuditChecklist!P4"

how do I reference without renaming the worksheet?

regards
peter