The plaintiffs sought leave to amend their statement of claim to significantly increase the damages claimed (from $60 million to $662 million) and to elaborate on the theoretical basis for these damages, including through the application of unjust enrichment.
This motion followed a prior summary judgment that established Ontario's liability for breach of contract, with damages to be assessed.
The defendant, Ontario, opposed the amendments, arguing they were barred by res judicata (issue and cause of action estoppel), abuse of process, and constituted a collateral attack, particularly concerning the unjust enrichment claim which was subject to a pending appeal.
The court granted leave for most amendments, finding no non-compensable prejudice.
It clarified that while the unjust enrichment claim as a cause of action was under appeal and could not be bolstered, the amendments could be used to plead theories of damages for the existing contract claim.