This book examines the conflicts between the attitudes of traditional trust lawyers and the proponents of the emerging principle of restitution of unjust enrichment. In particular it considers recent developments in these areas and their ramifications for commercial and financial contracts. Swaps, Restitution and Trusts analyses the case of Westdeutsche v. Islington LBC and its ramifications on the swaps markets. The book advances the thesis that claims in relation to restitution of money, arising in relation to financial transactions, ought to be founded on a notion of suitability. * Includes an in-depth analysis of Westdeutsche v. Islington LBC and the local authority swaps cases * Highlights the four key issues arising from the Islington case * Examines problems in detail and gives solutions suitable for use in future cases.