The symptom
The signs are everywhere. A solar and battery project in County Durham was given a grid connection date of 2036. The government accepts that some projects wait up to fifteen years to connect, and that the queue of firms wanting a connection grew by 460% in six months. Britain often has the money and the plan and still cannot get permission to plug in.
HS2 and the bat tunnel
The emblem of the problem is a single structure on HS2, a bat protection tunnel that cost around £100m, one of more than 8,000 consents the project had to obtain. The human and financial detail is on the human cost and the evidence page.
The claim
On the Starkey account the binding constraint is not money but a permission system that no minister controls and no voter can shift, built from environmental law, judicial review and arm's-length bodies. That is why the decline may sit upstream of the economics, the argument made on cause and effect.
The honest picture
Others point to under-investment, high energy costs and planning politics that predate any constitutional change. The constitution is one cause among several, not the only one.