Gloucester Grammar School Case

Facts

• The plaintiff operated a grammar school and charged fees to students
• The defendant, a former schoolmaster, opened a competing school in the same town
• Students left the plaintiff's school for the defendant's, causing the plaintiff's fee income to decline substantially
• The plaintiff sued for this financial loss

Issue

1. Whether a person who lawfully competes for business, causing financial loss to an existing competitor, is liable for that loss.

Held

• The defendant's act of opening a competing school was itself entirely lawful
• No legal right of the plaintiff was violated merely by the defendant's lawful competition
• Genuine financial loss, however real, is not actionable where it flows only from the exercise of another's own lawful rights
• This is damnum sine injuria: damage without legal injury

Ratio Decidendi

Where damage results from lawful competition or the lawful exercise of one's own rights, and no legal right of the plaintiff is violated, no action lies, however real and substantial the financial loss suffered. Damnum sine injuria is not actionable.