This report seems to me like common sense - reuse assets across government to deliver similar services and only configure / change the bits that need to change rather then rebuilding the whole lot time and time again. This is exactly the ethos behind Pega's architectural approach. We call it the situational layer cake https://www.youtube.com/watch?v=QHFAeVkP6Nk and it provides a means of dramatically reducing time to value and total cost of ownership.
Report advocates digital ‘Lego blocks’ for public services. Green paper and manifesto claim new approach to building services could produce annual savings of £46 billion