Mr. John Mullins:

Yes, it is enormous. I know from investing in battery storage in France through my own company that a 300 MW battery would cost €150 million. We have this infrastructure already in place. All it needs is a very simple codified process with Eirgrid. Essentially, when curtailment is called, we do not have to take off as many wind farms but just switch in the tanks. The people we want to prioritise first are those in social housing and local authority housing. The people, as Ms McDonnell has said, who have actually taken this on board are seeing it in their bills now. There are many more people across the country who are on the margins of fuel poverty, estimated at around 550,000 households. Last night, we would have been able to fill 1.3 million tanks because the weather changed overnight. We are moving from a nominated, virtual approach, with thanks to the retailers I mentioned earlier, to an automated technical solution which is essentially a battery bank made up of 3 kW boilers right across the country, of which we have many.