BPSS is short for Baseline Personnel Security Standard. It helps in the pre-employment screening of people interested in working in government jobs. BPSS clearance is an important precaution taken by the government and the interviewing committee to make sure that the person that they are hiring undergoes a strong and well-defined criminal record check to ensure the safety of government records and information. bs7858 clearance is one such procedure that is precisely used for employee vetting in the UK, especially in the security sector jobs.