I guess the basic claim is about right. Labour don’t show their working so it is hard to know. Certainly energy price rises have been big news recently and they stick out hugely because the Coalition government has largely succeeded in freezing many people’s council tax for the last three years. By comparison energy prices are painful. But in fact they rose more quickly under Labour before Labour’s 7.2% single dip recession.
Look at this picture taken from page 6 of House of Commons Library Note SN/SG/4153.
In the 5 years under Labour, 2004 to 2009, gas prices went up 88% and electricity prices increased by 54%. Although they are still going up now the rate of increase is less than then. Labour was lucky in that the worldwide slump in energy prices fed through into consumer prices in the UK in 2010 so the average dual fuel bill of the typical consumer went down by £79 in 2010. But even taking this into account dual fuel prices rose £361 in the 2005-2010 period. The rise in the 2004-2009 period was an eye-watering £524. Look at tables 2 and 3 at the end of the note. All figures Standard Credit/All.
So the Cost of Blair/Brown was way worse than the Cost of Cameron until the world energy price slump partially rescued their numbers.