The Digest of United Kingdom Energy Statistics (DUKES) has
estimated that over 80% and 30% of the demand for coal and natural
gas, respectively, have been from major power producers over
the last decade, which meanwhile is responsible for about onequarter
of total CO2 emission in UK [1]. The dominated final electricity
consumer in UK has been always the residential sector,
the consumption of which increased by 58% between 1970 and
2011 [1]. More than 7% of total electricity generation has been lost
through the transmission and distribution system in UK, and surprisingly
this figure is higher than that of other major European
countries those have even lower population density, such as Spain,
France and Germany [2]. Therefore, with the pressure to reduce