A list of sets that have either been altered whilst available or are re releases of previous sets; this may be for aesthetics, part availability, function, structural integrity or other reasons.

Criteria:
1. Changes in mould or print (including changes causing new piece/item number) don't count. This would also cover minor changes e.g. adding pupils to an existing head design, or updating a head to a 'gap stud' from a 'solid stud'.
2. Sets released containing the same parts but different packaging or year of release won't be listed
3. Sets where the design has been reworked due to parts change(s) WILL be included, e.g. #4563 redesign due to reduced cab cut-out