The English Profile Programme is a major inter-disciplinary, research-based collaborative project to develop detailed reference level descriptions (RLDs) of the English of L2 language learners, linked to the general principles and approaches of the Council of Europe. The Common European Framework of Reference (CEFR) provides language proficiency bands against which the profile is categorised. Large samples of writing and speech are required for the Programme, with the Cambridge Learner Corpus providing data for the initial phase.