The Authority wishes to select a single supplier to deliver a transformation and transition management service and a set of related projects (some of which are inflight) to facilitate the delivery of the Next Generation Communication network (NGCN) programme of work and it's benefits, network service improvements and Defence Digital strategic outcomes and to support building a high performing Next Generations Fixed Networks Team (NGFN). This work includes the design of the next target operating model and selection and procurement of a Network Systems Integrator (NSI) supplier who will then carry the work forward in the next stage.;