Have a look around the website - I don't know about your degree or anything, but I'm finding things like;http://www.dur.ac.uk/school.health/pg/entry/english/
" One of the following is required:
IELTS test achieve an overall band score of at least 7.0 (with no other element below 6.0)
TOEFL iBT (Internet Based Test) achieving at least 102 (with no element under 23)
Cambridge Proficiency (CPE): Grade C
Cambridge Advanced (CAE): Grade A
Cambridge GCSE First Language English at Grade C or above
Cambridge GCSE English as a Second Language at Grade B or above
GCSE English Language at grade C or above
Pearson Test of English (overall score 62 (with no score less than 56 in each component)
The British IELTS is Durham University's preferred test.
In all cases the English Language Test transcripts and certificate must have been issued within two years of the programme start date and must be received by the admissions tutor."http://www.dur.ac.uk/international/studyabroad/exchange/incoming/howtoapply/englishreq/
Aha; University admissions guidelines! http://www.dur.ac.uk/learningandteaching.handbook/1/3/1.3.1/#
"3. Candidates who are not native speakers of English (from a country listed in 1.3.3) should either:
a. have been taught and passed a qualification which meets the University's entry requirements using the English Language, within two years prior to their programme or pre-sessional course start date or
b. have taken a recognised English Language proficiency test within two years prior to their programme or pre-sessional course start date (see 18.104.22.168)."