CIE (Cambridge International Examinations) Hasn't reformed yet. Plus they have summer and winter examinations. For CIE you could take Pure 1, Mechanics 1 or statistics 1 in May 2017 then Pure 3 and Statistics 1 or 2 or Mechanics 1 or 2 in November 2017. When I was planning to take it at AS being a private candidate my exam centre charged me £50 per module so it was £100 altogether for AS then if I continued I would have paid £100 again later in the year for my A2 modules. The only thing was the distance. Hounslow is just arrhhh