According to Norwegian media, citing the La Stampa piece claims that he has admitted that he wanted to blow himself up.
I guess we will find out, but Southack, you would have to agree that the witness accounts of the guy lying down before "exploding" his bomb tends to indicate that he knew what was going on.
Cheers.
Absolutely. Presuming that's real and not just disinformation, yes, he knew.
I'm unconvinced that they all knew, however, because it makes no sense to leave 16 unexploded bombs in their car on 7/7 or for all 5 July 21 "suicide" bombers to surrender before death.
There is also the issue of timing. If you aren't using an automatic timer or a remote detonation signal (e.g. cell phone, proximity to a radio transmitter, altitude trigger, etc.), then it takes an increased level of human discipline (depending upon how many are involved) to get all of the volunteer suicide bombers to kick off at the same time.
Keep in mind that both the 7/7 and 7/21 attacks detonated simultaneously. That hints of an automatic timer or a remote detonation signal.