if you have done the search and then come up with some specific points which need clarification, then I am sure that the learned and very generous participants in this forum will help you understand those - but asking them to do the entire job for you is demonstrating little other than your own laziness.
I did all my law essays myself. you need to look at the ordinary prudent man of business test and recent trustee act. You also need to look at breaches of trust and part 64 CPR, together with acquiesance and laches. Try Lewin on Trusts, Hayton and Winkley on Trusts and Snells Equity.
I could do this question standing on my head, but then I have spent a whole lifetime studying rather than asking someone else for answers!