Complex sentence: Her screen debut came with the 2003 television film "Boudica (Warrior Queen)", and her performance in the 2004 drama film "My Summer of Love", gained her the Evening Standard British Film Award for Most Promising Newcomer.
Split into simpler sentences: Her screen debut was in the 2003 television film "Boudica (Warrior Queen)". Her performance in the 2004 drama film "My Summer of Love" garnered her the Evening Standard British Film Award for Most Promising Newcomer.