I know some on here were potentially affected by the leak of the Edexcel Economics A-level paper and the stolen C3 and C4 maths A-level papers.
Here's Edexcel's response. They've not been able to say anything before because of an ongoing police investigation:
schoolsweek.co.uk/setting-the-record-straight-on-the-edexcel-a-level-exam-leaks/
They will be looking carefully at results for any statistical anomalies and evidence that students have been advantaged and will hopefully return a fair result for all students.