Liberty Global has posted a far better set of figures for the first quarter of 2014 than for the last quarter of 2013, with revenues up 2% year-on-year at $4.5bn and operating income up 10% at $582m, starting to justify its intense focus on the quad play. Liberty’s overall strategy has crystallized. It has finally moved out of original content with completion of the sale of most of its Chellomedia division to AMC Networks in January. This mirrored Virgin Media’s earlier exit from the content business when it sold its wholly owned TV channels to arch-rival Sky early in 2010. Liberty is now operating more evenly across the whole spectrum of quad play, building up its mobile strategy around both…