The certainty and stability afforded to the law of property by imposing a limit on the number

The certainty and stability afforded to the law of property by imposing a limit on the number of permissible legal estates are seriously undermined by the existence of a seemingly endless number of equitable interests.
Critically discuss the above statement.
1-5: introduction; Real property concepts; Law of Property legislation;
Unregistered title
6- 9: Land Registration
10-13: Co-ownership
14-16: Informal acquisition of property rights
and a bit Mortages and Charges