Original sentence: Consideration under English law is anything of value (an item or service), which each party to a legally-binding contract must agree to exchange if the contract is to be valid.If only one party offers consideration then the agreement is not a contract
Edited sentence: Consideration under English law is a very controversial doctrine comprising a series of sub rules in English law which purport to govern when a promise made by one party may be enforced by the party to whom the promise is made in the jurisdiction of England and Wales