Repair and maintenance services of security and defence materials. Strategic Support Supplier (SSS) for Dismounted Close Combat (DCC) Surveillance and Target Acquisition (STA) equipment which comprises a number of weapon sights (target acquisition), head mounted night vision (enhanced vision) and target locating equipments. The SSS system will deliver, but is not necessarily limited to: STA equipment spares provisioning and spares re-procurement activity, receipt of equipments, storage, maintenance, repair, issuing and distribution of equipment to and collection from Purple Gate, and eventual disposal of in-scope equipments, and any Information Management System required to facilitate this. Whilst the maintenance, upkeep and obsolescence management is within the scope of the STA SSS project, procurement of new equipment and upgrades to deliver enhanced capabilities are not within scope, and will be delivered through individual projects. Once new equipment has been delivered by the Authority, the ongoing support will be undertaken by the STA SSS project. Equipment scope is subject to change and will be confirmed within the ITT. The scope and quantity of equipment supported by the STA SSS project is also likely to change throughout the term of the contract as new equipment is introduced and existing equipment is taken out of service. Consequently, optimisation of the supply chain, flexibility and resilience to address changes in fleet size, equipment scope and demand fulfilment will be key requirements of the SSS.