Typically, you will need to have either:

a 2:1 honours degree in a relevant subject area such as mathematics, operational research, statistics, computer science, management science, economics, engineering or a suitable science degree, or an equivalent international degree
a university-recognised equivalent academic qualification
or relevant professional experience evidenced by a reference. The reference must be from your employer to evidence that you currently work in an area relevant to the programme. This should be signed, dated and less than six months old at the time you submit your application.
English Language requirements:

IELTS with an overall score of 6.5 with 6.0 in all subskills, or an accepted equivalent.

Other essential requirements:

You will also need to provide an academic or professional reference to support your application. Your referee should comment on your academic ability, work ethic, and general character. References should be signed, dated and less than six months old at the time you submit your application.
TOEFL (iBT) - At least 90 overall with a minimum of 20 in each subskill
International Baccalaureate Language A- HL 4 or SL 5