The article does not provide any details about wind energy that was left "unharvested" (ie enough wind, but turbines intentionally braking) whenever it would not be feasible to store it for later consumption.
I do not know if that is a large issue in the context of Britain, considering the 5.6 GW of hydro storage capacity it has.
I do not know if that is a large issue in the context of Britain, considering the 5.6 GW of hydro storage capacity it has.
https://app.electricitymaps.com/zone/GB?lang=en