Prime Minister David Cameron and his family do not benefit from any offshore funds, his spokesman said on Tuesday, after the British leader came under pressure over his late father's inclusion in the "Panama Papers" revelations over tax havens.
During a visit to a business in central England on Tuesday, Cameron said he did not own any shares or have any offshore funds but did not answer a question on whether he or his family had benefited from offshore investment funds set up by his father. On Monday, his spokeswoman had said it was a "private matter".
In a statement on Tuesday, a spokesman for Cameron said: "To be clear, the prime minister, his wife and their children do not benefit from any offshore funds." He did not say whether they had benefited in the past.
"The prime minister owns no shares ... Mrs Cameron owns a small number of shares connected to her father's land, which she declares on her tax return."
The leader of Britain's main opposition party urged the government to tackle tax havens, accusing Cameron of allowing "the super rich elite" to dodge taxes.
Leaked documents from the Panamanian law firm Mossack Fonseca have provided evidence of how the world's rich and powerful used secretive offshore company structures to stash their wealth.
The documents named Cameron's late father Ian and members of his Conservative Party among the list of the firm's clients.
The government has promised to investigate the leaked data but opposition Labour leader Jeremy Corbyn called for more to be done, including setting up an independent investigation.
"There cannot be one set of tax rules for the wealthy elite and another for the rest of us," Corbyn said at the launch of Labour's campaign for local elections next month.
"The unfairness and abuse must stop ... no more lip service, the richest must pay their way."
Corbyn said Britain had a "huge responsibility" as many tax havens are British overseas territories, such as the British Virgin Islands and Cayman Islands, or crown dependencies, such as Jersey or the Isle of Man.