* The Imperial College Centre for Energy Policy and Technology gives the prospective delivered cost of hydrogen to residential customers as 4.8 pence per kilowatt hour, when the hydrogen is produced by electrolysis.⁵⁴ Of this, 2.5 pence is incurred by hydrogen production: the rest is accounted for by compression, storage and distribution. The NAE’s figures suggest that in ‘the future’, hydrogen produced from gas with capture and storage will cost 44 per cent as much as hydrogen produced by electrolysis, which means that production, if these figures hold, will cost 1.1 pence per kilowatt hour, bringing the total cost of hydrogen delivered to residential customers down to 3.4 pence. In November 2005, natural gas cost households 2.3 pence/kWh. In November 2004 it was 2.0 pence/kWh.⁵⁵