If you have identified an unattended item as suspicious then you should follow a series of specific actions.
Those dealing with suspicious items should apply the 4Cs protocol:
CONFIRM: Whether or not the item has suspicious characteristics. The HOT protocol may assist with this
CLEAR: The immediate area
COMMUNICATE: Call 999
CONTROL: Access to the cordoned area
You should consult ProtectUK for further guidance on unattended items or items found to be suspicious.