Use the following link to help you decide the eligibility of a role: -
https://www.gov.uk/find-out-dbs-check
There is lots of further information on the DBS site via this link though an overview of the types is as follows: -
Basic DBS check
A Basic DBS check is available for any position or purpose. A Basic certificate will contain details of convictions and conditional cautions that are considered to be unspent by the Rehabilitation of Offenders Act 1974.
Standard DBS check
Standard DBS certificates show relevant convictions and cautions held on the Police National Computer (PNC), subject to filtering and rehabilitation rules.
Enhanced DBS check
An Enhanced DBS check is available to anyone involved in work with vulnerable groups, and other positions involving a high degree of trust. Enhanced certificates contain the same information as a Standard certificate, with the addition of relevant local police force information that a Chief Constable feels ought to be included.
Enhanced with Barred List(s) DBS check An Enhanced with Barred List(s) DBS certificate contains the same information as an Enhanced DBS certificate but includes details of whether the individual is included on one or both of the Barred Lists. These lists include individuals barred from working with children and vulnerable groups where the role is in regulated activity.