Her connection to then Mayor of London Boris Johnson from 2012 came to national attention in the UK in September 2019 when he became Prime Minister, triggering investigations into alleged conflicts of interest.

Arcuri studied for an MBA at Hult International Business School, where she met Tom Hayes and founded software company Title X Technology with him in 2012, using developers in Bulgaria.

[10] She defended Hayes in the Wall Street Journal after he came under investigation for the Libor scandal in 2013, for which he was later sentenced to 14 years in jail.

[16] She also founded Hacker House in 2016, a consultancy that advises and trains on cybersecurity,[3] coming out of a "Legislating LulzSec" event run by Innotech in October 2014.

[17] Hacker House received a grant from the UK Department for Digital, Culture, Media and Sport Cyber Skills Immediate Impact Fund in 2019, sharing £500,000 with three other projects.

[4] Arcuri had a close friendship with then-Mayor of London Boris Johnson,[25] with the Sunday Times describing him as a regular visitor to her flat,[26] and implying they were in a sexual relationship.

On 9 November 2019, it was revealed that the IOPC, which had been due to publish a report on its investigation, had decided to do so after the general election of 12 December.

The IOPC said in its statement "While there was no evidence that Mr Johnson influenced the payment of sponsorship monies or participation in trade missions, there was evidence to suggest that those officers making decisions about sponsorship monies and attendance on trade missions thought that there was a close relationship between Mr Johnson and Ms Arcuri, and this influenced their decision-making.

[6] In December 2021, Vice News reported that Arcuri was promoting QAnon and anti-vaccine conspiracy theories on her Twitter account and Telegram channel.