Click on the map and the latitude and longitude of where you've clicked will be shown. Alternatively click the 'Get Map Centre' button to get the location of the centre of the map. Or you can type the latitude/longitude to see the location on the map. And you can use Street View to improve your positioning, where it's available.
Click on the map to get the latitude/longitude
|Nearest UK station|
|Improve positioning with Street View|