[KevinMS]

every wind/solar farm on the grid needs backup gas turbines, whether its already built or not, which costs money either way, but those are never included in the cost.

[benj111]

In the UK, demand has been steadily going down. We don't need new gas power stations to cover increased usage.

[KevinMS]

you aren't getting it. You need to match, on demand, any solar or wind generation. On demand means gas turbines, because nothing else can power up quickly enough. X amount of power generation from a wind farm needs X amount of capacity sitting around waiting to come online.