here are three main levels of DBS check available:

Basic Check – This check shows all unspent convictions of the applicant. Can be applied for by a company.
Standard Check – Eligible for certain roles that don’t have regular contact with children or vulnerable adults such as financial, legal and gaming.
Enhanced Check – This is a mandatory check for roles involving children and vulnerable adults which shows all spent and unspent criminal convictions and reprimands. Not only is this checked against the Police National Computer but also against the children and adults barred lists.