Alternative pleading describes the procedural practice of putting forward two or more different, and potentially inconsistent, factual or legal bases for a claim or defence, so that if one fails another may succeed. It allows a party to say, in effect, “if not A, then B”, without admitting either as definitively true at the outset.In England and Wales and Northern Ireland, the Civil Procedure Rules permit a party to advance inconsistent cases in the alternative, provided there is a proper factual foundation and the statements are made in good faith. Irish and Scots procedure follow the same broad approach, though the terminology and detailed rules differ (for example, averments in the alternative in Scotland).Alternative pleading is typically used where the claimant is unsure which legal characterisation (such as contract, tort/delict, misrepresentation, unjust enrichment) the court will prefer, or where the precise facts (e.g. formation of the contract, identity of the contracting party, or causation) are genuinely unclear pre-trial.Courts in all four jurisdictions will strike out abusive or speculative alternatives, but otherwise accept alternative pleading as a legitimate case‑management and litigation risk‑management tool.