Complex sentence: In January 2010, HMV Group announced that Waterstones like-for-like sales over the Christmas period were down 8.5 per cent on the previous year and that managing director Gerry Johnson had left the business with immediate effect.
Split into simpler sentences: In January 2010, HMV Media announced that Waterstone's like for like sales over the Christmas period were down 8.5 per cent on the previous year. It was also announced that managing director Gerry Johnson had left the business with immediate effect.