Specifically, the power price across the UK is the same everywhere. However, there isn't infinite transmission capacity. So, if you generate power in one place, but the power network cannot transport it, you get told not to bother producing it, but you still get paid, and you get paid compensation on top.
You know what's better than producing power... being paid to produce power, paid extra compensation, and then not need to actually have those wind turbines spinning (so much reduced maintenance too!).
The government is delaying lots of permits till they can figure out how to change these perverse incentives... Needless to say, the wind industry isn't happy about the fact they might no longer get paid such large amounts, so they're demanding the old scheme be kept in place for existing producers for 25+ years, and having the new pricing rules only apply to new builds...