LONDON (Reuters) – Australian businesses have committed to investing 28.5 billion pounds ($37.5 billion) in sectors such as infrastructure and clean energy in Britain, the British government said following a UK-Australia investment roundtable. British Prime Minister Boris Johnson and International Trade Secretary Anne-Marie Trevelyan met with 10 Australian chief executives and senior executives on Wednesday evening to discuss the investments and opportunities for further collaboration. The investments include a pledge by financial services firm Macquarie Group to support 12 billion pounds of i…