This is a somewhat technical article but one point made is that your Local Plan will fail if you have not documented and minuted things such as how you have dealt with the “Duty to Co-operate”.
Our council is very lax with its minutes: some meetings have no minutes at all, some have minutes that seem to bear little resemblance to the meetings that took place and some minutes are so secret that no-one except those in the meetings get to see them. Transparency pays off in the end.