A U.K. watchdog has thrown a spanner into the proposed $3.7 billion merger between Getty Images and Shutterstock after it said the latter needed to sell its editorial business. The Competition and Markets Authority (CMA) is a significant roadblock in the deal after it said earlier this year that it had concerns over the supply of editorial content to publishers both big and small in the U.K. The Financial Times reports that the CMA has provisionally decided that the sale of Shutterstock’s global editorial business would assuage those concerns. Shutterstock operates Shutterstock Editorial, Backgrid, and Splash. “We provisionally found that a loss of competition could lead to U.K. media outlets, large and small, facing a loss of choice or getting a more expensive service, with knock-on effects for consumers that rely on high-quality content to stay up to date,” says Margot Daly, chair of the independent inquiry group leading the CMA investigation, per the Financial Times .…