OCR (Oxford, Cambridge and RSA Examinations) is an examination board that sets examinations and awards qualifications (including GCSE and A Level).  Many schools use this exam board and I have found it to be quite a friendly and clear in its approach and it is wonderfully transparent.  From West London English and Media Teacher.  English and Media Teacher in Harrow, London http://www.ocr.org.uk/qualifications/by-subject/english/