The Gov.UK website explains the work carried out by the DBS, how it relates to safer working practices, and the different levels of DBS checks as:

The Disclosure and Barring Service (DBS) helps employers make safer recruitment decisions each year by processing and issuing DBS checks for England, Wales, the Channel Islands and the Isle of Man. DBS also maintains the Adults’ and Children’s Barred Lists, and makes considered decisions as to whether an individual should be included on one or both of these lists and barred from engaging in regulated activity.

Our disclosure teams carry out DBS checks (previously known as CRB, or criminal record checks).

There are four types of DBS check, and each type results in a DBS certificate being issued to an individual. Employers can then ask to see the certificate to ensure that they are recruiting suitable people into their organisation.

The four levels of DBS check are:

• Basic DBS check
• Standard DBS check
• Enhanced DBS check
• Enhanced with Barred List(s) DBS check

The information contained on each type of check is different. 

(Gov.uk, n.d.)

For all roles at Aiming Higher, an Enhanced DBS check is required. The following is the information regarding Enhances DBS checks according to the Gov.UK website:

An Enhanced DBS check is suitable for people working with children or adults in certain circumstances such as those in receipt of healthcare or personal care. An Enhanced DBS check is also suitable for a small number of other roles such as taxi licence applications or people working in the Gambling Commission.

The certificate will contain the same details as a standard certificate and, if the role is eligible, an employer can request that one or both of the DBS Barred Lists are checked.

The certificate may also contain non-conviction information supplied by relevant police forces, if it is deemed relevant and ought to be contained in the certificate.

An individual cannot apply for an Enhanced DBS check by themselves. There must be a recruiting organisation who needs the applicant to get the check. This is then sent to DBS through a Registered Body.

The service is free for volunteers.

(Gov.uk, n.d.)