By Eliot Wilson At today’s International Investment Summit, ministers must recognise that businesses want concrete assurances about the kind of returns they can expect, says Eliot Wilson Today is the government’s long-anticipated International Investment Summit, which will bring together potential investors from abroad and within the United Kingdom and is intended to show, in the business and trade secretary’s words, “Britain is open for business, and we are the investment destination of choice”. This is a major event for Sir Keir Starmer’s administration, 101 days old, given the central task …