I replied to him this way:
The film's actual title- in credits- is Blowup- no hyphen.
Second, you repeat one of the worst examples of critical cribbing, that I nailed when I reviewed this a year or two ago: http://www.cosmoetica.com/b441-des374.htm
The two leads have NO NAMES. Not once are their names uttered in the film. This claim is from a press kit, possibly, but not anywhere in the film. Where did you get the claim, other than from other reviews?
It should be fun to see his reply.
Anyway, here are The Yardbirds, from the film, and its trailer: