I work in UK Government and the problem is that procurement depts are so afraid of awarding tenders to dodgy suppliers they add so many layers of bureaucracy that it prevents local or more innovative contractors. The rules are much more flexible for low value tenders <£30k but it is a very exclusionary system.

Please realise there are many civil servants and local government officers that realise the system is overly bureaucratic and are encouraging procurement teams to change their processes, but it is mostly dictated by national legislation.

I think allowing mayoral authorities to flex their procurement systems for innovative solutions would be a good testing ground. The whole point of devolution is to allow areas to spend money locally how they see fit and it can become a bit of a laboratory for new, risky ideas that - if they pay off - can be copied by other places.