MPhil/MSc by research: 2.2 Honours degree, or equivalent in a science or engineering subject; PhD: 2.1 Honours or equivalent 1st degree in a science or engineering subject; IELTS (6.5 with no sub-test under 5.5); TOEFL (570 with 5.0 in TWE); CBTOEFL (230 with 5.0 in TWE).