There are calls for a review and free appeals as concern grows over "volatility" in this year's results.
Some students who haven't got the results they wanted are angry about how the situation has been dealt with.
Brett McCullough, Donald Dinnie and Christopher Stuchbury died when the train left the track near Stonehaven.
Flash floods spark travel disruption, after yellow storm warnings are issued for swathes of the UK.
Health officials are working with the sandwich makers in Northampton, where 299 tested positive.