Particular opportunities exist for students from Commonwealth countries via the Commonwealth Scholarships Commission postgraduate schemes:

http://www.cscuk.org.uk/apply/postgraduate_study.asp

Graduates in Physical and biological sciences with First class degree are invited to be considered for a Fee Scholarship of 5000 to 9000 British pound per annum for a 4 year PhD in Structural Biology. In your application you will need to demonstrate that you would aim to pursue a career closely aligned with the activities of SESAME either as a user or SESAME staff visit the URL for more details:

http://www.liv.ac.uk/study/postgraduate/finance/scholarships.htm