The Rules of the Supreme Court (Northern Ireland) (Revision) 1980

Counterclaim by defendant

7.—(1) A defendant to an action begun by originating summons who has entered an appearance to the summons and who alleges that he has any claim or is entitled to any relief or remedy against the plaintiff in respect of any matter (whenever and however arising) may make a counterclaim in the action in respect of that matter instead of bringing a separate action.

(2) A defendant who wishes to make a counterclaim under this rule must at the first or any resumed hearing of the originating summons by the Court but, in any case, at as early a stage in the proceedings as is practicable, inform the Court of the nature of his claim and, without prejudice to the powers of the Court under paragraph (3), the claim shall be made in such manner as the Court may direct under rule 4 or rule 8.

(3) If it appears on the application of a plaintiff against whom a counterclaim is made under this rule that the subject-matter of the counterclaim ought for any reason to be disposed of by a separate action, the Court may order the counterclaim to be struck out or may order it to be tried separately or make such other order as may be expedient.