This is a boundary map of Buckinghamshire, which shows key roads and towns. It also provides selectable boundaries for Community Boards, Wards, Parishes and Polling Districts (updated when new boundaries are defined and provided).
If you click the link at the top of the page or the map itself, you will be taken to an interactive version of the map. The interactive version allows to select and deselect the layers such as Wards etc. plus you can zoom in an out to see the level of detail you require.