The contracting authority acknowledges that there are some workplaces / tasks and activities undertaken within its remit, that potentially present a high risk to the assigned lone worker. To mitigate this risk a Lone Worker Protection System may be provided where deemed suitable and appropriate to control the risk. The contracting authority intends to enter a contract with the successful tenderer for 36 months with an optional further 12 months extension. The contracting authority estimates that approximately 65 units comprising 50 nr smartphone applications and 15 nr devices will be required (not guaranteed)