Completed & No shortlist = Rejected or Backup
Selection & Shortlist = Doing background check
Completed & Shortlist = Finished background check, HR need time to decide on your offer
Straight offer = HR already finished background check before TT because you applied early and all your documents are submitted

DBS hiring 130 people this year, so might be around 65 people for this TT and in their shortlist currently. If you do not have shortlist email, wait for people in the shortlist to reject their offers.

They offering people that are shortlisted by next week, and 1 week to consider. If you never get any offers by the following week, it is time to move on.