Not content with building up its stake in German pay-TV outfit Premiere, News Corp (NYSE: NWS) has now bought the 20 percent of Latvian free-to-air broadcaster TV Riga that it didn’t own. NWS already owned all of entertainment channel LNT. Its News Corporation European TV (NCE) division also had shares in Bulgaria, Poland, Serbia and Turkey, as well as 37 percent of BSkyB (NYSE: BSY). Tom Mockridge, whom News Corp’s new Europe CEO James Murdoch promoted to CEO of NCE recently, is certainly getting stuck in, all the while chasing down a growing Premiere stake, which now stands at 25.01 percent after buying earlier share in January and February.