Herve Falciani, a former HSBC (HSBA.L) employee who leaked information on the bank’s clients and tax situation, told Spanish newspaper El Mundo he had knowledge of other cases and could act again, adding his “work was not done”. Falciani previously said that media leaks on HSBC accounts held in Switzerland, which unleashed a public storm around the British bank, were “only the tip of the iceberg”, and that tax authorities had access to a lot more data.