London, April 10 UK Chancellor Rishi Sunak is demanding a Whitehall inquiry to find out who leaked details about his wife Akshata Murty's tax arrangements.
Murty has said she will pay UK taxes on her overseas income, following a row over her non-domicile status, the BBC reported.
Downing Street has rejected newspaper reports that its staff leaked damaging stories about Sunak to the media.
It has been a bruising week for the Chancellor, and now he has asked senior civil servants for a full investigation to establish who divulged his wife's tax status.
His allies say very few people had access to the personal information, which Sunak declared to Whitehall officials when he became a minister in 2018, the BBC reported.
Some Conservative MPs say he was naive to think the details would remain private, and that he should have predicted that the tax arrangements would be criticised as inappropriate, despite being legal.
Sunak's team has dismissed suggestions of a rift with Downing Street and say the prime minister has been "incredibly supportive".
The Chancellor's brand, vigorously promoted since he came to office, has been damaged, with some members of the ruling Conservative Party questioning his judgement.
Opposition MPs have said Sunak's family is benefiting at a time when he is putting up taxes for millions of others, the BBC reported.
Opposition Labour Party MP Louise Haigh said: "I think the question many people will be asking is whether it was ethical and whether it was right that the Chancellor of the Exchequer, whilst piling on 15 separate tax rises to the British public, was benefiting from a tax scheme that allowed his household to pay significantly less to the tune of potentially tens of millions of pounds."
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