Estoppel – Convention. The proceedings concerned a refusal to register the transfer of shares in a company where, it was alleged, there were pre-emption rights in place. The judge found that there was clear evidence to support an assumption, common to both parties, that there were no valid rights of pre-emption in relation to the shares. The Court of Appeal, Civil Division, held that the judge had been correct and that the authorities did not suggest that estoppel by convention was confined to cases of mistake. A mistaken recollection was not legally different from a state of forgetfulness.