My hon. Friend makes a very good point. I will come on to illustrate the scale of the problem that she so rightly raises early in the debate.
All households should enjoy energy prices that are as low as possible, along with the protection afforded by a robust regulatory system. All should have access to comprehensive consumer advice services. It is important to stress that, in talking of households left off the mains gas grid, we are not talking about a handful of remote villages. Millions of people rely on off-grid energy. As a Cornish MP, raised in the duchy, I have always been aware that, for many local households, energy is not simply a matter of flicking a switch for a piped supply. It involves an expensive process of sourcing, purchasing and securing delivery of a private supply of heating oil or LPG or, nowadays, of finding a renewable source of energy. However, it was only on entering Parliament and joining the all-party group on off-gas grid, so ably led by my hon. Friend the Member for Suffolk Coastal (Dr Coffey), that I fully appreciated the scale and geographical extent of off-gas grid energy usage.
Across the UK, 4 million households are off the mains gas grid. Their inhabitants comprise 15% of the population. Those households are not confined to rural areas, as 49% of off-gas grid households are situated in urban areas. The households reliant on off-gas grid energy do not represent a marginal group—an exception to be brushed over—but instead comprise millions of families and individuals living in cities, towns and villages and on farms across the country. What, then, is the state of the off-grid gas energy sector that serves them?
A comprehensive study of the sector was published last month by the all-party group, drawing on evidence from off-grid energy suppliers, off-grid energy customers, consumer groups and the Department of Energy and Climate Change. The picture painted by the report is stark. It reveals a sector in desperate need of the sort of changes now being applied to the mains gas grid network.
One thing is particularly clear: off-grid households pay more for energy. Work undertaken by the heating bill comparator Sutherland Tables reveals that a typical three-bedroom house, costing an average of £975 a year to heat on mains gas, would cost more than £1,570 to heat with heating oil and a staggering £2,170 to heat with bulk LPG. Overall, off-grid households pay 60% to 120% more for energy than households connected to the mains gas grid.