I'm a non-native English speaker, who have applied for a PhD position at Hull University, UK. However, I am a bit in doubt about what evidence I need to provide in order to prove my English proficiency. In the application form both IELTS and TOEFL were listed separately, but on their homepage it seems that I only need one of the tests (http://www2.hull.ac.uk/student/admissions/international_applicants/english_language_requirements.aspx).
Is it normal to take only one of the tests or do you need both?