Is there a pizza tape?
Grewal at one time claimed that there were four hours of tape, and the Conservatives in the end released an hour and fifteen minutes worth. Obviously some people will assume the worst: that the Tories have more tapes that they haven't released, or that Grewal has more tapes that he hasn't given to the Tories. It is perfectly possible, of course, that there are no more tapes, and the four hours was yet another Grewal-ish exageration, much like his claim of being offered a cabinet post (it seems that he was offered no more than the vague prospect that he might be considered for a position as parliamentary secretary). But if there were a pizza tape, this would close the gap between what was released and those notional four hours.
The existence of the Pizza Tape would also explain an odd thing about the release of the tapes. Before the release, many people were complaining about the time it was taking for them to be made public. The reason, we were told, was that the Punjabi sections of the tape had to be translated and transcribed. But in what was released, there is not a lot of Punjabi. The initial phone-calls between Kalia and Grewal (about 8 minutes), and some parts of his discussions with Dosanjh (I'm guessing only another 7 minutes--they shift back and forth between Punjabi and English.) It doesn't take a week to translate 15 minutes of Punjabi.
If, however, there was a Pizza Tape, there'd be (what?) another hour (?) of Punjabi. This would take longer to translate.