The term 'low carbon nation' is challenging to define in relation to the UK, which is (and is likely to remain) a high carbon nation compared with many other nations. Perhaps 'lower carbon nation' would be a better term to use.
There are various national, regional and local responses to the Low Carbon challenge in the UK.
London sees itself as an exemplar city in the transition to low carbon. It also provides leadership to the C40 cities climate leadership group.
Greater Manchester is positioning itself as an entrpreneurial testbed for inward investment.
The North East is adapting traditional industries into sustainability-related businesses (eg bioenergy).
Wales is developing a 'hydrogen corridor'.
Scotland, through its position as a more devolved administration than other regions, is developing its 'central belt' region and sees wind, wave and tidal renewable energy as an important part of its future green growth.
The jury seems to be out on whether the demise of the Regional Development Agencies will hinder the transition to a lower carbon nation.