Inquisitive (not suspicious) minds thinking about energy prices.

The energy price cap - the maximum amount suppliers can charge customers in England, Scotland and Wales for each unit of energy - will go up in October and again in January. But what does the price cap mean, and how is it calculated? Adam finds out with Robert Buckley, from Cornwall Insight (the company crunching the numbers behind the forecasts), and Jess Ralston, at the Energy and Climate Intelligence Unit.