Basic housekeeping - Basic good housekeeping reduces the opportunity for planting suspect packages and helps deal with false alarms and hoaxes. It reduces the number of places where devices may be left.
Your staff know their workspace best, you are asking them to CHECK if anything is out of place or unusual.
Recognising what is normal for your environment can then lead on to what is not and therefore suspicious.
British Transport Police deal with thousands of unattended items and by using the H.O.T. (Hidden Obvious Typical) protocol, they can risk assess a situation to avoid unnecessary disruption or loss of production.
Consult with your local Police Scotland CTSA For further information and guidance.