That 25% figure always struck me as fantasy. Given the size of Europe, I never understood how Scotland had 25% of the offshore wind potential. I don't think it's ever stood up to scrutiny tbh.
As others have said the denominator in that calculation has been wrong for a long long time. It is also a very strange thing to brag about.
Our actual capacity and generation is something to brag about. Not that it reduces our bills though.