US president Donald Trump has criticised UK’s net zero policy and described North Sea oil as ‘highly taxed’ - BRENDAN SMIALOWSKI/AFP A major North Sea energy supplier has become the most shorted company on the UK stock market amid attacks from Donald Trump on offshore wind turbines. Ashtead Technology, which rents equipment to offshore oil, gas and wind projects, has 7.5pc of its shares in the hands of hedge funds, which have sold them short to profit from an expected share price decline. Hedge funds sh ...