In response to the news that Australia has to correct its GPS coordinates to account for continental drift, the Ordnance Survey blog examines whether Great Britain will have to do the same. “The situation for us (and most of Europe) is not so bad. Europe’s GPS compatible datum, ETRS89, is fixed to the European tectonic plate at the time 1 January 1989 and moves by around 2.5 cm each year. In theory, GPS-derived coordinates are now about 70 cm away from where they should be in the ETRS89 system.”