Where can I find the 2014 GCSE Edexcel Examiner Reports/ Moderator Reports? Watch
Click on question papers, and there are all the past papers.
You want to find the ones that start with B.. So B1 will be core science Biology, B2 will be additional science biology, and B3 will be triple (or futher additional) science Biology. You can download any of the years apart from the June 2014 papers which are only available to teachers who have a login.