By Jessica Frank-Keyes Labour have clocked up a record 17-point lead over the Conservatives among UK businesses ahead of the July 4 general election, pollsters at Savanta have found. Sir Keir Starmer’s party secured 49 per cent among the 1,000 UK business leaders asked who would be ‘best for business in the UK’, versus Rishi Sunak’s Conservatives who trailed on 32 per cent, according to the first Savanta business tracker since the election was called. It marks the biggest gap Savanta has ever recorded, after a week which saw Labour riven by a row over whether veteran left-winger Diane Abbott w…