I'll have another look. I think it might just be the angle from which the photograph is taken. If I can, I'll try to get a copy of the image to post, but since it's in part of the AWC dealing with EW I don't think I'll get a camera in there.
What confused me was that there didn't seem to be a nav/strobe light on the end, nor was there a black patch which I would expect to see (Notch aerial? Cover for some other aerial?) Also, it seems significantly more curved than the normal wingtip.
And yes, it is defo 100% a Tornado!