I've put together a short video about the prospects for wind power in the UK.
It is only five minutes long.
I didn't give the context but wind power provides up to 60% of UK electricity at present and new wind farms are being constructed all the time. The amount provided varies depending on supply (i.e. windiness) and demand.
Indeed, the problem now is that when it is windy the wind farms have to be disconnected from the grid because there aren't enough connections between the areas with the wind generation (Scotland in particular) and the rest of the country.
In the future, when wind is capable of powering the whole country the price of electricity will probably drop to zero. This is because there is no need for any fuel to run the wind turbines.
The UK no longer uses coal to generate electricity, since it is so much more polluting than gas.
All the wind, solar and batteries that we add to our grid in the UK means less purchase and burning of methane gas.