Suppose a defendant to a competition claim runs a defence that, in the counterfactual world in which no anticompetitive conduct occurred, pricing would have been no different; and that the claimant replies, “maybe so, but only because you were at the same time operating some independent anti-competitive scheme, which must also be purged from the counter-factual”. Can the claimant amend his claim to plead the independent anti-competitive scheme raised in his Reply as the basis for a new substantive claim even where it would ordinarily be time-barred?
In February last year, Barling J appeared to answer, “Yes”, in a judgment given in the MasterCard litigation. On one view, the curious result of that judgment was that a claimant could apparently circumvent limitation rules by introducing a time-barred allegation of unlawfulness in his Reply, then using that as a basis to apply to amend his original claim. In other words, when a limitation point blocked the front door, claimants could still bring in new claims through the back.
The Court of Appeal, however, has now shut this back door, by overturning the High Court’s judgment. For the background to the judgments, and the details of Barling J’s decision, see my previous post here.
The issue before the Court was whether or not the new claim, premised on MasterCard’s Central Acquiring Rule (CAR) arose out of the same or substantially the same facts as the existing claim, premised on MasterCard’s Multilateral Interchange Fees (MIFs) (see CPR 17.4 and section 35(5) of the Limitation Act 1980). If it did, the Court could permit an amendment notwithstanding that it was time-barred. Barling J had held that it did on the following two grounds: first, the existing claim would already require an investigation into and evidence on the CAR; and, secondly, the claimants’ reply had pleaded that the CAR was unlawful and had to be excised from MasterCard’s counterfactual – so the new claim arose out of facts already in issue with respect to the existing claim.
The Court of Appeal disagreed with Barling J on both scores. Sales LJ said that the facts underlying each claim could not be said to be the same because the counterfactual inquiry required by each claim was so different (§46). On the existing claim, the counterfactual world was one in which the MasterCard rules in dispute (principally the MIFs) were excised but the CAR remained in place. On the new claim, however, the Court would have to investigate both the counterfactual world in which the MasterCard rules were excised as well as the CAR and the counterfactual world in which all the MasterCard rules remained in place but the CAR was excised.
Sales LJ, doubting the obiter comments of Waller LJ in Coudert Brothers v Normans Bay Ltd  EWCA Civ 215, further said that the claimants could not introduce the new claim by pointing to their reply and saying that the CAR’s lawfulness was already in issue. The proper rule was that, where the defendant had pleaded facts by way of defence to the original claim, the claimant could introduce a new claim premised on those facts: Goode v Martin  1 WLR 1828. However, that was not the case here because MasterCard did not specifically rely on the CAR in its defence.
The Court of Appeal was further clearly motivated by a concern about the avoidance of limitation rules. Sales LJ said at §64:
…it would be unfair to a defendant and would improperly subvert the intended effect of limitation defences set out in the Limitation Act if a claimant were to be able to introduce new factual averments in its reply (which are not the same as or substantially the same as what is already pleaded in the claim), after the expiry of a relevant limitation period, and then rely on that as a reason why it should be able to amend its claim with the benefit of the “relation back” rule to circumvent that limitation period.
The curious result of Barling J’s judgment has therefore been reversed by the Court of Appeal. A claimant can no longer pull himself up by his own bootstraps; limitation now guards the back door as jealously as the front.