An Essex couple have become the first people in the country to trial a scheme that sees them heat their home using a data centre in their garden shed. Terrence and Lesley Bridges have seen their energy bills drop dramatically, from £375 a month down to as low as £40, since they swapped their gas boiler for a HeatHub – a small data centre containing more than 500 computers. Data centres are banks of computers which carry out digital tasks. As the computers process data, they generate lots of