Apparently candidates who had access to the full paper after it was stolen from a Parcelforce van have been disqualified.
Those who had access to extracts online - it was deemed that these were of too shitty a quality to offer a clear advantage (i.e. those candidates still got the same grade) and there was no impact on grade boundaries.
schoolsweek.co.uk/leaked-aqa-chemistry-a-level-paper-was-stolen-from-parcelforce-van/
Hopefully this will offer some reassurance to those who sat the paper that they will not have been unfairly disadvantaged.