Also according to Wikipedia the following fossil-fuel power stations have closed since 2010:-
Ferrybridge C, Littlebrook D, Ironbridge, Teesside, Fawley, Didcot A, Tilbury B, Roosecote B, Grain, Kingsnorth A and one ( a small gas turbine) has opened.
The power stations that closed produced 13.7 Gigawatts. Wind power in the UK now has a total installed capacity of 14 Gigawatts - peak production obviously, but it's pretty windy here.
There's also just under 10 Gigawatt of installed solar power and it's not always foggy here.