We questioned the Cabinet Office how confident it was that there would be a smooth transition and that members would receive no disruption to service. The Cabinet Office acknowledged that delays to key deliverables were a significant concern though noted that each milestone has a range of work packages that sit underneath it and therefore focusing on the completion of the whole milestone probably belies how much work has actually happened. It told us that it believed Capita had underestimated the complexity of the transition and the length of time it would take to implement the technology and that it was working with Capita to produce a new delivery plan with realistic dates.49