Where practices need to recruit staff, they should have regard to the proper recruitment processes which may include the need for further checks, depending on the responsibilities included in the job.
For example, issues may be flagged up during the application and interview process - if there are gaps in the applicant's CV or problems with references then this might suggest the need for a DBS (formerly CRB) check. Practices should also have a process in place for risk-assessing the need to carry out checks on staff. However, when employing or contracting GPs, remember that they will already have needed to get a DBS (or CRB) check in order to get on the performers list.
There is helpful guidance available
from NHS Employers (PDF on their site)
from the CQC
Practices may also consider it worthwhile contacting the DBS to discuss any individual situations that they have concerns about.
Contact the DBS