This paper builds on a strong body of work in the development bank space and takes the National Investment Bank proposal by Labour’s Shadow Chancellor John McDonnell forward. A National Investment Bank (NIB) must coordinate with other key economic institutions, each doing their part in the support of sustainable economic growth in order to fulfil its mandate. Here we outline the rationale of a mandate of the proposed NIB taking into account the work of previous authors and their insights. The main aims of an NIB would be:
Addressing the long-term funding gap for small and medium-sized enterprises across the country, emphasizing innovation and sustainability;
Addressing the long-term funding gap for infrastructure investment across the country, including both physical and social infrastructure.
