Carl Ganter is co-founder and managing director of Circle of Blue and is vice chariman of the World Economic Forum Global Agenda Council on Water Security.

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The new test "has sort of thrown everyone into a tailspin, " said Janet Roberts, the director of education at Aristotle Circle, a tutoring and consulting firm.

WSJ: Big Change in Gifted and Talented Testing

Mr Parsa will remain on the board of Circle as founder and a non-executive director, the company said.

BBC: Hinchingbrooke: Ali Parsa steps down as chief executive

Mr Sullivan, who was arrested in January over alleged corrupt payments, told the inquiry he believed that he would have been one of a circle of reporters Scotland Yard's communication director Dick Fedorcio would have trusted to talk to.

BBC: Leveson Inquiry: Lawrence leak had 'negative effect'

Rodgers and Hammerstein's South Pacific picked up four Outer Critics Circle awards - outstanding revival of a musical, outstanding director of a musical for Bartlett Sher, outstanding actor in a musical for Paulo Szot and outstanding featured actor in a musical for Danny Burstein.

BBC: US critics give Broadway honours

Ali Parsa, Circle chief executive, has announced he is stepping down to become a non-executive director.

BBC: Cambridgeshire