LONDON—News Corp.'s U.K. newspaper unit is facing 46 more civil lawsuits that have been filed in British court alleging voice-mail interception by the company's now-closed News of the World tabloid, bringing the total number of settled and unresolved cases to more than 100, according to a lawyer representing the bulk of the claimants.

The lawyer, Hugh Tomlinson, told the High Court in London on Friday that the 46 cases are likely not the end of legal action against the company. He noted that London's Metropolitan Police had...