A lot of people are assuming that the sponges were "planted" in the pits at Cardiff.
If I'm right, Neils said that the sponges were found before the meeting at Coventry on Monday.
How often do mechanics check the fuel tanks?
Unless you have a timeline of who had access to his equipment, before, during and after the GP and someone can say his fuel tank was sponge free at the critical time, you'll struggle to identify a culprit, if indeed there is one...