There's plenty of data.

Analysis: Wind power has saved UK consumers over £100 billion since 2010 – new study

https://www.ucl.ac.uk/news/2025/oct/analysis-wind-power-has-...

The interesting part is that 130 Billion of the savings were in reduced gas prices as it reduced demand, particularly in winter, and freed up gas storage.

And this is depsite an effective ban on constructing onshore wind in England from June 2015, more than half the 2010 to 2023 time period studied.