Prime Minister Keir Starmer usually goes out of his way not to annoy Donald Trump. So he better hope the windmill-hating U.S. president doesn’t notice what the U.K. just did. In a fillip for the global offshore wind industry, Starmer’s government on Wednesday announced its biggest-ever down payment on the technology. It agreed to price guarantees, funded by billpayers to the tune of up to £1.8 billion (€2.08 billion) a year, for eight major projects in England, Scotland and Wales. The schemes have the capacity to generate 8.4 gigawatts of electricity, the U.K. energy department said — enough to power...