In April her revelation that Rishi Sunak's wife was using non-dom status while living in No11 Downing Street set the news agenda for weeks across Fleet Street. While the Sunak's refused to comment on the story ahead of publication, a confirmation from Mr Sunak's wife, Akshata Murthy, shortly after publication highlighted Isaac's impeccable sourcing, as the origin of the story became a hot topic in the conservative press. The story, published on the day a rise in national insurance rates kicked in, raised further questions about the chancellor's family finances and tax affairs, such as his green card status. It also led to a commitment from Ms Murthy to give up the tax status estimated to have saved her millions of pounds a year. As the Partygate scandal began in September, it was Isaac's reporting that confirmed Boris Johnson in attendance at a gathering in Downing Street in May that contributed to the unravelling of the prime minister's claim he had no knowledge of wrongdoing, for which he is now under investigation in the Commons. Then, as the prime minister attempted to fight back against those claims, Isaac revealed 'Operation Save Big Dog' - Johnson's plan to mitigate the damage to his premiership - which now has become one of the more memorable phrases associated with the Johnson government.