Claims about Mr Zahawi’s tax affairs began emerging when he was appointed chancellor by Boris Johnson last summer, with reports suggesting Cabinet Office officials had alerted the then-prime minister to the HMRC dispute.

Source: https://www.alloaadvertiser.com/news/national/23267721.nadhim-zahawi-pressure-admitting-careless-tax-error/?ref=rss

Days before the Guardian’s revelations and Zahawi’s public statement admitting the error, Sunak said that he had “addressed this matter in full”.

Source: https://www.theguardian.com/uk-news/2023/jan/28/sunak-was-warned-of-zahawi-reputational-risk-in-october-say-sources

Magnus said that the details of HMRC’s own investigation – relating to Zahawi’s co-founding in 2000 of opinion polling firm YouGov, and how many shares his father had taken to support its launch – was outside the scope of his own inquiry.

Source: https://www.shorenewsnetwork.com/2023/01/29/uk-pm-sunak-sacks/

The furore has heaped political pressure on Rishi Sunak, who has ordered his new ethics adviser, Sir Laurie Magnus, to investigate Mr Zahawi’s tax affairs.

Source: https://www.independent.co.uk/politics/nadhim-zawahi-tax-dispute-tory-mp-b2267525.html