If you would like to study in University of Sussex, United Kingdom and pursue Full Time Phd Research Program in Mathematics you can avail University of Sussex Fully-Funded Phd Studentships which is being offered by the University of Sussex.
This is a Phd Research Program Merit Based Scholarship and students are eligible from UK, Europe (Non-UK) Students to apply for the same.
This Scholarship will offer you the scholarship includes £14057 (2015-16) per annum tax-free bursary and waiver of UK/EU fees each year for 3 years. Full-time study is available. The award includes an additional training grant of £1650 p.a. for short courses, books, travel, conferences etc for 3 Year.
Further details:
http://www.scholarshipstimes.com