Complex sentence: He was nominated in the category of "Best Serial Drama Performance" at the 2011 National Television Awards; that same year he was also nominated in the category of "Best Actor" at the British Soap Awards.
Split into simpler sentences: He was nominated in the category of "Best Serial Drama Performance" at the 2011 National Television Awards. That same year he was nominated in the category of "Best Actor" at the British Soap Awards.