For those geeks (like me) who actually enjoy reading literature produced by other Association's, here is Tracey Crouch MP's latest Westminster Report. The only thing of note from an agent/campaigner perspective is how we try to localise this for each ward in the constituency. Whilst pages 1,2,3,4,5 and 8 are common throughout, pages 6 and 7 change for each ward. This allows the local councillors to tell their own local success stories it also gives a degree of local "ownership" and encourages prompt delivery. It also prevents one on my pet hates - two pieces of literature landing on the doormat at the same time.
Producing 13 different versions is more time consuming and complicated (especially when councillors don't meet deadlines!) but I believe it's worth the extra effort.