As a new digital tool, Mobility as a Service (MaaS) provides the opportunity for novel approaches in delivering policy outcomes when led by public authorities. Harnessing the opportunity offered by MaaS requires not only a behavioural, operational and commercial transition for public bodies, but also a digital transition. Whilst complex, this transition opens up opportunities. Collaborative digitalisation means recognising that participating actors and stakeholders can often have competing motivations and objectives, reflecting the complexity of delivering MaaS as a system of digital and commercial relationships. However, with the right behaviours and frameworks, all parties can align towards a common goal. This cannot be achieved by chance, but only through concerted and considered effort to develop a culture of collaboration. This paper explores the evolving collaborative delivery model being taken by the West of England Combined Authority in its digital transition to deliver a policy led, customer focussed MaaS solution.