It is often thought that equity acts as the "conscience of the common law". Equity also is said to act in personam rather than in rem. In the light of this statement, please explain how the rules of equity apply in property law.

include (but not limit) answers to the following:

The concept of an equitable interest.

What is the relevance of the doctrine of estoppel to property law?

What are the elements of successfully establishing an estoppel claim?

What are the differences and similarities of equitable, proprietary and promissory estoppel?

Nb:- No need to discuss resulting or constructive trusts