NS&I told us it had now successfully completed all the procurement stages and secured all the suppliers for the Rainbow Programme, meaning it was moving into the delivery phase. Despite meeting this milestone, NS&I still described the Rainbow Programme as a “big, complex programme” with many moving parts and challenges. NS&I explained that the three successful suppliers had developed their plans in isolation, meaning there was currently only a “loose plan” for the Rainbow Programme. NS&I adde...

NS&I told us it had now successfully completed all the procurement stages and secured all the suppliers for the Rainbow Programme, meaning it was moving into the delivery phase. Despite meeting this milestone, NS&I still described the Rainbow Programme as a “big, complex programme” with many moving parts and challenges. NS&I explained that the three successful suppliers had developed their plans in isolation, meaning there was currently only a “loose plan” for the Rainbow Programme. NS&I added that it was going through a process of creating an “integrated plan” with the three suppliers.36 We questioned NS&I on the revised timeline for the Rai Type: conclusion | Number: 20 | Response status: accepted Government response: 4.1 The government agrees with the Committee’s recommendation. Recommendation implemented 4.2 Developing a transition plan is a complex process reflecting the technical and cultural complexity of changing a structure that has been in place for 25 years. This involves