If the man in question has not had a road bike before, which way you measure the frame is going to matter little. As long as it is roughly the right size he will be able to tweak it to suit, with a different stem perhaps, or more set back on the seat post/longer seat post.
From the picture I think the issue he may have is the height of the bars. Those bars look quite low in comparison to the front axle, which would mean a 6'2'' rider bending forwards quite a bit. Which is OK if he's some kind of gymnast, but im not, and I've had promblems trying to reach too low on my Giant, so I know its not good. And with no extra steerer showing for adjustment, that could be the kiss of death for him and this bike.
Anyhow, happy hunting! £200 is quite a tight budget though