It used to be, but not anymore, according to a Tom Scott video and interview with people working there. The National Grid used to look at the TV listings and pu

It used to be, but not anymore, according to a Tom Scott video and interview with people working there. The National Grid used to look at the TV listings and put Dinorwig on standby for busy times, but there's so many TV channels and streaming options now that there isn't so much of a coordinated sharp spike of the whole country doing something at the same time. Its main use now is in balancing calm moments of solar and wind power generation, apparently. Source: - https://youtu.be/6Jx_bJgIFhI?t=210 https://youtu.be/6Jx_bJgIFhI?t=210