The Doctor and The Marine (Doctor Who Photo)

I've been a long time Doctor Who fan since the 1980s and I am currently watching the series in order from episode 1 and currently just started watching the War Games, the second Doctors last adventure. So I was blown away this morning when I saw this photo of a Marine in his dress Blues standing next to the legendary 4th Doctor Tom Baker. Being a Fan of our beloved Corps and the Doctor Who, this is both worlds coming together in one great picture. I would love to know the background of this photo!