If you visit the north Lancashire coast you can see rows of windmills near the horizon. The closest is Barrow, 90MW. Nearby are 3 others: West of Duddon Sands 389MW, Ormonde 150MW, Walney 9MW. Just off the Mersey is Burbo Bank Extension under construction 256MW. Further out is Gwynt y Mor 576MW.
1.5GW of wind power in a small section of the Irish Sea.