You don't need to speculate, the data is available online. For instance, for quarterly data Ofgem publish here :

https://www.ofgem.gov.uk/data-portal/electricity-generation-...

For "live" hourly data : http://gridwatch.co.uk/

For what it's worth, wind tends to be heavily concentrated in (windy!) areas (or off-shore), so if you don't frequent them you may not notice.