Financial orders following divorce or dissolution
The Matrimonial Causes Act 1973 is the essential statute for resolving financial remedy disputes: http://www.opsi.gov.uk/RevisedStatutes/Acts/ukpga/1973/cukpga_19730018_en_1
The essential case reading for this chapter is the case of White v White: http://www.publications.parliament.uk/pa/ld199900/ldjudgmt/jd001026/white-1.htm
There are many other important cases but this is the one to start with.