As the leader of the house may know, today is the first day of the latest capacity market auction, by which the National Grid buys back-up capacity for the grid. In the latest auction, at the end of 2016, a proportion of that market was won by diesel farms, which was a smaller proportion than previous years, but still significant. Diesel farms are noisy, they are polluting and they can be in place for 10 to 15 years. Will the Government bring forward a statement on the prevalence of those farms in Wales, what contribution they make to poor air quality and obstacle they present to the Government to achieve its environmental targets, and whether, as has happened in England, public bodies in Wales have been approached by the grid to make use of their diesel generators to provide back-up capacity?