You dont have to be at Greenwich to verify this.
Just open Google Maps and look up Greenwich.
You will notice that the Prime Meridian does not pass through the Royal Observatory.
The Prime Meridian and many other places continue to shift coordinates even as you read this.
This is for another cause continental drift.
As a consequence, all individual locations are in motion relative to them.
In UK, WGS84 latitudes and longitudes are changing at about 2.5 cm per year in a north-easterly direction.
Laser projected from the observatory marking the Prime Meridian line.Photo credit
Sources:Wikipedia/www.thegreenwichmeridian.org/Royal Museums Greenwich
