Rule 1(f) ABCI's claim for fraudulent misrepresentations is founded on a tort and the damage, namely ABCI's entry into the contract of 2nd April 1982 and its payment of the 2,500,000 Tunisian dinars thereunder, resulted from a "substantial and efficacious" act (see Dicey & Morris ...) in the commission of the tort which act took place in England. That act was the making of the misrepresentation to A BCI who acted on it in London by being induced in London by the misrepresentation made by BFI'to act as it did and by accepting in London BFI"s contractual offer