Britain’s Court of Appeal on Monday ruled that a lower court should look again at how pay-TV group BSkyB sells its sports channels to rivals, in the latest twist in a near four-year battle. Market regulator Ofcom ruled in March 2010 that Rupert Murdoch’s BSkyB should make its two main sports channels available to rivals such as Virgin Media and BT at a lower price. Sky, which built its business around offering exclusive sports programming, responded by taking the case to the Competition Appeal Tribunal (CAT).