Oh and if the power goes off how is the sewage going to be pumped and also the gas and water.
All the Water and sewage companies are building large power generation programs as we speak. Your water company and Thames water are the two big leaders in this field and both have some huge poo to power generation facilities which not only make the sewage works where they reside carbon neutral, but actually contribute to the national grid.
UU's largest at Davyhulme (you'll see the two huge methane domes as you drive over Barton bridge), generates 9MW. There are more smaller ones around the region. Over your way, Ellesmere port and Bromborough both have CHP units that are working their way to making the plants carbon neutral and beyond.
There are further huge scale biomass energy generation plants being built to process organic refuse. Teeside and Widnes have both been targeted as locations for multi-megawatt generation facilities.
Further to this, all large electricity users are being approached for discussions on how they can manage their facilities to avoid brown outs at peak periods already. So for example, a supermarket chain that uses lots of refrigeration units, could agree to allow them to be automatically spun down slightly during periods of high demand to ensure the grid does not drop below an acceptable level. Large businesses like water companies, steel works and the like are also areas where demand can be smoothed out to help balance the load.
The original bbc article suggests there will be blackouts...if nothing is done but there is plenty being done which that article does not take into account.