You'll need to reset some of the $CityPosN values in WU-radar-inc.php to have them display the location of Gosport correctly.
Use
http://www.gosportwx.com/WU-radar-testpage.php?show=loc and use your mouse to reposition the marker and copy the $CityPosN value into WU-radar-inc.php to fix it. It doesn't use the lat/long in the script for positioning the markers.