London Underground stations have cabinets at the end of each platform which contain emergency equipment. In addition, control panels and boards are located throughout the network. It is essential that these are not interfered with, and if they are then this should be immediately apparent to duty staff.
The cabinets and control panels have previously been secured with tamper evident labels. However, these left an unsightly residue each time the label was removed, which was often necessary for routine maintenance or checking. London Underground sought labels that were tamper evident, and would work on a wide variety of surfaces, but would not leave any residue on removal.
Security Labels International had recently developed its own formulation of no-residue security labels in response to demands from the aviation security sector, and as a result had launched a standard known as no-residue Label Lock.
With only minor modifications, we were able to manufacture a custom version of the no-residue label for London Underground, which contained their unique coded numbering, colour scheme and logo. If a label is removed, the word ‘OPENED’ clearly appears on the label as an
irreversible tamper message. As a result London Underground can now secure the cabinets and control panels in stations, and remove the labels to facilitate routine maintenance without leaving unsightly hard-to-remove residues. This continues to save the time and cost associated with residue removal. Any unauthorised security breach is clearly visible as the label will change to read ‘OPENED’ across its surface. These labels can be seen on platforms throughout the London Underground network.