David Grant (Have You Seen This Man?)

From Tardis Wiki, the free Doctor Who reference

You may be looking for the stunt performer.

David Grant was an individual who saw the Ninth Doctor in a photograph of his father from his army days.

Grant wrote about this on the website Doctor Who?, mentioning that the Doctor was in the background, holding something made of steel which he could not identify as it was "out of the picture". (PROSE: Have You Seen This Man?)