Complex sentence: The attached Savacentre, which predated Eastgate, was lost and replaced with an ASDA store in 2004, when Allders went into administration it was replaced with a Debenhams store in 2005.
Split into simpler sentences: The attached Savacentre, which predated Eastgate, was replaced with an Asda store in 2004. When Allders went into administration it was replaced with a Debenhams store in 2005.