The definition of 'consideration' in contracts as Lord Justice Bowen explained in Carlill v Carbolic Smoke Ball Co [1893] 1QB 256 includes: ... any act of the plaintiff from which the defendant derives a benefit or advantage, or any labour, detriment or inconvenience sustained by the plaintiff, provided such act is performed or such inconvenience is suffered by the plaintiff with the consent, either express or implied, of the defendant.

Discuss the meaning of 'consideration' in contracts in light of the above judicial definition with at least three specific examples of valid consideration.

Your answer refer to the relevant case law and statutory provisions where necessary to support your assertions.