The government is keen on increasing community involvement in public services. Some libararians are too.
How could this work in practice?
Friends groups could be broadened.
New community library committee/boards could be formed. These could be constructed on the lines of SACREs, the community bodies responsible for RE syllabi. Essentially this would mean drawing up a schedule of membership to ensure that all groups are represented- ethnic, age, gender, users, staff and the council.
What would the role of such a body be? Legally the council is responsible for libraries. They might be able to devolve such a role to a Board, so long as a council member was part of said board. Or, more likely, the board could act as an oversight body, keeping both staff and councils honest.
Such a body would have a potential cost, mostly admin, and this would need to be balanced against the potential benefits. These would include (one would hope) long term vision, engagement and a real user focus.