Engines of Prosperity update

A targeted update to our Engines of Prosperity documents from 2016-17, to clarify key mills statistics. Research and updates to the publication to be undertaken and produced by the consultants who produced the original document. Outputs required: 1. A short report which explains the methodology, assumptions, and data sources used in the analysis (including a clear explanation of the valuation challenges addressed in creating the GVA figures), as well as the key statistics broken down at each of the following levels...