Like many, you probably have people with a “knowledge is power” attitude that are unwilling to pass on access to relevant information because they might feel that to do so would somehow denude their warped sense of superiority.
It is an abject failure on the part of county or national associations if they do not encourage councillors to access information and documents at that level.
It is a character flaw on the part of council Chair / Clerks if they seek to prevent councillor access.
Individual councillors should INSIST that they be granted access to all information which empowers them in their role if the subscription fees are paid from PUBLIC MONEY it is not for a clerk or chair to deny councillor access