I’d guess the wind farm will be Octopus.
I’m in a postcode area that allows me access to Octopus Fan Club. It has been saving me a lot of money. The discount is either 0%, 20% or 50% dependant on wind speed. I moved off Octopus Go as there wasn’t much electric use I could shift to the 4 hour period (01:00-05:00), bear in mind I don’t have an EV.
I’ve had the tariff since October and it very rarely drops below 20% and is often at 50% discount. I’m not sure if Autumn and Winter tend to be more windy? Hopefully not as it could mean little discount in the summer.