Pink Floyd tuba? (not Pilafian)

[funkcicle]

I just thought I'd ask if anybody knows who did the tuba playing on Pink Floyd's "The Wall" (the movie version, not studio). I've read several times that it was Sam Pilafian but I'm almost certain it's not(the DVD features some footage of the orchestra, the tubist doesn't look like Sam). Sam's biographical indication seems to imply that his work with Pink Floyd was not on the Wall, as well.

Incidentally, the orchestra footage on the DVD also reveals a euphonium and Wagner tubas!