“…There are a number of well-known cases in which the term ‘cause of action’ has been considered, see for example, Cooke v. Gill (1873) LR 8 CP 107, Brett J at p.116, and Letang v. Cooper [1965] 1 QB 232 (CA), Diplock LJ at p.242-243. However, the specific issue that arises on this appeal was specifically …”