There are no texts specified as essential but the following are all recommended for students to choose from;  

Text Books  
Hudson, A., Equity and Trusts , 7th ed. 2013, Routledge-Cavendish  
Virgo, Graham,  The Principles of Equity and Trusts, 2012, Oxford University Press

Moffat, G., Trusts Law, Text and Materials , 5th ed. 2009, Cambridge University Press  
Oakley, A. J., Parker and Mellows: The Modern Law of Trusts , 9th ed. 2008, Sweet and Maxwell  
Pettit, P., Equity and the Law of Trusts , 11th ed. 2009, Oxford University Press  
Panesar, S., Exploring Equity and Trusts, 2010, Pearson  
Martin, J., Hanbury and Martin: Modern Equity , 18th ed. 2009, Sweet & Maxwell  

Shorter Texts  
Watt, G. Trusts and Equity , 3rd ed. 2008, Oxford University Press

Penner, J. E. The Law of Trusts , 5th ed. 2006, Oxford University Press  
Hudson, A. Understanding Equity and Trusts , 3rd ed. 2008, Routledge-Cavendish  
Edwards, R. and Stockwell, N. Trusts and Equity , 9th ed. 2009, Pearson Education.  

Cases and Materials Book  
Watt, G. Todd and Watt's Cases & Materials on Equity and Trusts , 7th ed. 2009, Oxford University Press  
Burn, E. H. Maudsley & Burn's Trusts & Trustees Cases & Materials , 7th ed. 2008 Oxford University Press  

Statute Book  
A number of satisfactory books are on the market but two good ones are;  
Thomas, M. Blackstone’s Statutes on Property Law 2009-10 , 17th ed, Oxford University Press  
Hewitson, R. Property Law Statutes 2010-11 , Routledge