London 2012 Olympics: watchdog commissioner resigns over Games' sponsorship link with Dow Chemical Meredith Alexander, who sits on the Commission for a Sustainable London 2012, has quit her unpaid role over the controversial £7 million deal with the chemical giant, which has angered human rights campaigners because of Dow's links to Union Carbide, the company responsible for the Bhopal gas disaster in 1984. Alexander's resignation comes after Lord Coe, the chairman of the London Organising Committee of the Olympic Games, defended the Dow Chemical deal, insisting that the company had no involvement with Bhopal at the time of the disaster or when the final compensation settlement was agreed. The commission, which is part-funded by Locog, was set up in 2007 to oversee the sustainability standards of the Olympic delivery bodies, fulfilling the promise made by London during the 2012 bidding phase that its sustainability commitments would be independently monitored. However, the commission's remit does extend to human rights issues or questioning sponsorship arrangements. Shaun McCarthy, the commission chairman, said: "While we wholeheartedly agree that human rights are of paramount importance, it is not something we as an organisation are empowered to handle." Jacques Rogge, the International Olympic Committee president, has conceded it is likely there would be drugs cheats at the London Olympics despite a planned 5,000 tests. "To say there will be no positive cases would be naive and misleading," he told BBC Sport on Wednesday. Athletes and officials arriving from overseas for the will have to supply biometric, facial and fingerprint data before being allowed entry in a tightening of UK border controls.