(1) A defendant to a proceeding may make a counterclaim against a person other than a plaintiff (whether or not the person is already a party to the proceeding) if—
(a) the plaintiff is also made a party to the counterclaim; and
(b) either—
(i) the defendant alleges that the other person is liable with the plaintiff for the subject matter of the counterclaim; or
(ii) the defendant claims against the other person relief relating to or connected with the original subject matter of the proceeding.
Note See r 464 (Counterclaim—pleading) and approved form 2.9 (Defence and counterclaim) AF2015-28
.
(2) If a defendant to a proceeding counterclaims against a person who is not a party to the original proceeding, the defendant must—
(a) make the counterclaim; and
(b) serve the following on the person within the time allowed for service on a plaintiff:
(i) the defence (including the counterclaim);
(ii) a sealed copy of any directions about filing and serving the defence (including the counterclaim);
(iii) a copy of a sealed copy of any other relevant order made in relation to the proceeding;
(iv) a copy of a sealed copy of the originating claim and its statement of claim;
(v) a copy of a stamped copy of all other pleadings filed in the proceeding;
(vi) a copy of a stamped copy of all applications in the proceeding not finally disposed of;
Note Application in a proceeding is defined in r 6006.
(vii) a copy of all affidavits filed in the proceeding, other than affidavits that are not relevant to the issues arising on the counterclaim;
(viii) a copy of all other documents that have been served by the plaintiff on the defendant, or by the defendant on the plaintiff, and are intended to be relied on;
(ix) a copy of all amendments of any document mentioned in subparagraphs (iv) to (viii) or details of the amendments.
(3) A person not a party to the original proceeding who is included as a defendant to a counterclaim becomes a party to the proceeding on being served with the defence (including the counterclaim).
(4) If a defendant makes a counterclaim against a person not a party to the original proceeding, the relevant provisions (see subrule (5)) apply, with necessary changes, as if—
(a) the counterclaim were a proceeding started by originating claim; and
(b) the party making the counterclaim were a plaintiff; and
(c) each party against whom the counterclaim is made were a defendant.
(5) In subrule (4):
"relevant provisions" means the following provisions:
• part 2.2 (Starting civil proceedings)
• part 2.3 (Notice of intention to respond and defence)
• division 2.11.2 (Default by plaintiff)
• division 2.11.3 (Default by defendant)
• division 2.11.4 (Default by defendant—partial defence)
• division 2.11.5 (Summary judgment).