Click any point on the map to display the postcodes for that area. They will appear on the map as red squares, hovering over them with the mouse will display the postcode value.
You can use the Find button to look for a place name (eg. st Marybourne), OS GridRef (eg. SZ 119 915) or postcode (eg. BH2 5BH).
As you move the mouse around the map the current coordinates are displayed as an OS grid ref and also as the full 12 figure grid ref.
Once the postcodes have loaded for an area, you can click on the map or a particular postcode and the coordinates and postcode will be displayed below, a marker will also be placed on the map to indicate their location.