Got to be honest, I'm not familiar with the rules regarding Welsh rules and regulations but in any event it is clearly good practice to include supporting papers when the agenda is sent out so that everyone is prepared for the decisions that are going to be required. However, sometimes we do have to be a bit realistic that the requirement to give three clear days notice (which in practice means five days or a week) can cause an issue for things that are simply not available at the time the agenda is posted. Nothing can be discussed if it's not on the agenda but sometimes accompanying reports or documents relating to planning applications for example might not be available so need to be sent out later or even tabled at the meeting. Afterall, nothing says you have to have a supporting paper at all on any agenda item and if you're unhappy with not having the paperwork in time, you can always vote to defer the item to the next meeting.