Is your village hall committee a committee of the council or a separate group, independent of the council but where the council has the power to appoint members?
For council committees generally, my council asks councillors to volunteer to join committees of interest. A list is then produced for consideration at the annual council meeting, debated and agreed (or changed) as part of the meeting. There's a similar process for appointments to outside bodies although clearly if there are more volunteers than spaces, there is a more complex vote to fill the places.