Which case established the defense of "Acts of the Claimant" under Rylands v Fletcher principles?

The case that established the defense of "Acts of the Claimant" under the principles of Rylands v Fletcher is Dunn v Birmingham Canal. This case is particularly significant because it illustrates the legal principle that when a nuisance arises, the actions or contributions of the claimant themselves can serve as a complete defense to liability.

In Dunn v Birmingham Canal, the court recognized that if the plaintiff engages in actions that contribute to the nuisance or damage experienced, it may negate the defendant's liability under the Rylands v Fletcher strict liability doctrine. This concept emphasizes that a claimant cannot seek recovery for harm caused by a nuisance when their own actions were a substantial factor in causing that harm.

This principle is foundational in nuisance law, as it creates a balance by acknowledging that claimants also bear some responsibility for the consequences of their own conduct in relation to the nuisance claim, thereby reinforcing the need for due diligence and caution on their part.