Under new EU guidelines, the proportion of the UK population covered by Assisted Areas has been reduced from 30.9% in the period from 2000 to 2006, to 23.9%
This reduction is a result of recent EU enlargement and the success of the UK economy in recent years. 
The basis of the map is to provide Tier 1 and Tier 2 areas for Regional Selective Assistance grants (RSA), recently re-titled as Selective Finance for Investment in the English Regions (SFI), but remaining as RSA in Wales and Scotland, and additionally large areas of the UK, where a lower level of grant aid can also be made available to Small and Medium companies. These areas are classified as Tier 3 (see tab England Tier 3), - this grant scheme is known as Enterprise Grant Scheme (EGS) for English companies, Assembly Investment Grant (AIG) for Welsh companies and Invest for Growth Scheme (IFG) for Scottish companies.
However, Government Aid can be only be provided by these current grant schemes within the constricts set out the European Commission which among other constraints require a degree of proof that a project will not proceed without the requested grant aid.