HELLO Lucky kathryn,
What you are asking for is a simple problem of spheric trigonometry,
Assuming that :
La and Ga are the coordinates of your departing point. La for latitude and Ga for longitude,
Lb and Gb the coordinates of your arriving point,
D the distance of the circle line between two points,
cos D = sinLasinLb + cosLacosLbcos( Gb-Ga )
cos D = sin51°30sin29°46 + cos51°30cos29°46cos95°22
cos D = 0.340
D=70°12, therefore 4212 NM.
philippe,