In the process of sourcing archive material for the box set, Dave shared with Marc two new pieces of music, inspiring him to begin working on lyrics for them. Due to long lead manufacturing times for box sets, neither `Northern Lights' (Soft Cell's first single since 2002) nor its companion `Guilty (Cos I Say You Are)' was ready in time to make the tracklisting. Instead, however, both will form part of the 1CD collection `The Singles - Keychains & Snowstorms' alongside all the classics.