What court case used the latin phrase Fiat justitia ruat caelum to declare chattel slavery was unsupported by common law in England and Wales?
Fiat justitia ruat caelum: Fiat justitia ruat cælum is a Latin legal phrase, meaning ""Let justice be done though the heavens fall."" Fiat justitia ruat caelum:  It was used in the landmark judgment, "Somerset v Stewart", where slavery was held to be unlawful at common law. Somerset v Stewart: Somerset v Stewart (1772) 98 ER 499 (aka "Somersett's case", or in State Trials v.XX "Sommersett v Steuart") is a famous judgment of the English Court of King's Bench in 1772, which held that chattel slavery was unsupported by the common law in England and Wales, although the position elsewhere in the British Empire was left ambiguous.
Somerset v Stewart