Note on obtaining grid references
A six-figure grid reference, employing three digits in each coordinate, to determine a 100 m square. The preferred format is:
<Grid letter><3-figure easting><3-figure northing>
Example: M518152
Grid references can be read from Discover Series maps available from the appropriate agency below:
Alternatively, it is possible to obtain/estimate grid reference by following the links below. Both of these sites give grid reference of the cursor position in a box to the bottom of the page (Get a Map site) or to the left of the page (OSI Smart Map site). Some browsers will display this information differently or not at all.
If you are unsure of your grid reference reading, please indicate this in the comment field on the Alien Watch form.
Northern Ireland
In Northern Ireland please use the Ordnance Survey Get a Map site.
Republic of Ireland
In the Republic of Irelnad please use the OSI Smart Maps site.
