For limitation purposes, it is the action brought that must be considered rather than the date of findings of fact.
Time starts to run when the claimants recognise that a worthwhile claim arises but in the case of fraud it is when the claimants have discovered enough to plead their case, whether or not the claim will succeed.
In Saddiq Omar Abu Seedo v Fahmy El Gamal and Others [2023] EWCA Civ 330, the Court of Appeal has considered when limitation periods begin to run and the position when later lies are discovered.