Photo of Alexi Mostrous
Alexi Mostrous

Head of Investigations

Alexi Mostrous worked at The Times and at the Guardian for 13 years in roles including Head of Investigations before joining Tortoise Media as a partner in 2019. He has won awards including News Reporter of the Year, Scoop of the Year, and Technology Reporter of the Year. Mostrous is the host of hit podcasts including Sweet Bobby, Hoaxed and Who Trolled Amber. Before journalism, he was a barrister.

Photo of Alexi Mostrous

Alexi Mostrous

Head of Investigations

Alexi Mostrous worked at The Times and at the Guardian for 13 years in roles including Head of Investigations before joining Tortoise Media as a partner in 2019. He has won awards including News Reporter of the Year, Scoop of the Year, and Technology Reporter of the Year. Mostrous is the host of hit podcasts including Sweet Bobby, Hoaxed and Who Trolled Amber. Before journalism, he was a barrister.

  • Alexi Mostrous
    A mother's loss: The case of Tarryn Baird

    Alexi is joined by the Observer's national news editor, Claudia Williams to discuss the case of Tarryn Baird. Last week, her husband, Christopher Trybus was cleared of driving her to kill herself. Where does a grieving mother who spent 10 years searching for answers go from here?  

    23 min • S1, E399

  • Alexi Mostrous
    Can Starmer survive the Mandelson fallout?

    This week, there's one story dominating the headlines: the Peter Mandelson scandal and whether it spells the end for Keir Starmer's troubled premiership. What does this episode tell us about Starmer himself and why has the Epstein scandal had so much political impact in the UK?

    21 min • S1, E397

  • Alexi Mostrous
    Can we be saved from AI?

    Meta and YouTube were found liable earlier this year in a social media addiction trial and ordered to pay out $6 million in damages. Could this be a blueprint for how to avoid history repeating itself with AI?

    28 min • S1, E393

  • Alexi Mostrous
    China’s shadow war: Ice picks in suburbia | Episode Three

    A businessman from Tunbridge Wells is accused of leading a double life. He's secretly recorded planning a brutal attack with ice picks on behalf of the Chinese state. His story takes a dramatic turn with a high-stakes escape.     Further listening:  China's shadow war: The dissidents | Episode One China's shadow war: The Americans | Episode Two

    32 min • S1, E391

  • Alexi Mostrous
    China’s shadow war: The Americans | Episode Two

    American citizens are recruited to carry out Beijing's dirty work on home soil. A Florida correctional officer poses as an art dealer, exposing the murky world of transnational repression and China's shadow war.     Further listening:  China's shadow war: The dissidents | Episode One China's shadow war: Ice picks in suburbia | Episode Three

    21 min • S1, E390

  • Alexi Mostrous
    China’s shadow war: The dissidents | Episode One

    Alexi goes in search of the “long arm” of the Chinese state following a series of attacks and bounties on British soil. He uncovers a coordinated campaign of fear that has left dissidents feeling unsafe in the UK – and asks what British authorities are doing to protect them.    Further listening:  China's shadow war: The Americans | Episode Two China's shadow war: Ice picks in suburbia | Episode Three

    38 min • S1, E356

  • Alexi Mostrous
    Hong Kong dissidents fear China’s hand in campaign of intimidation and attacks in UK

    British-based activists reveal a rise in violence and harassment – and say police are ignoring their concerns

    Sun, 29 Mar 2026

  • Alexi Mostrous
    Can AI write a Booker prize-winning novel?

    For years, we’ve worried AI will take over junior-level jobs. But a new experiment with Anthropic’s creative chatbot has put celebrated authors on notice

    Fri, 20 Mar 2026

  • Alexi Mostrous
    Can AI write good literature?

    Last week, the New York Times ran an experiment that has far-reaching implications, especially for book lovers. It asked readers to compare five pairs of writing samples — one written by AI, the other by a well-known author — and choose which they preferred. AI was chosen much of the time. So, can AI actually write good literature? Booker Prize judge Erica Wagner, The Observer's books editor Tom Gatti, and author Ada Barumé discuss

    23 min • S1, E353

  • Alexi Mostrous
    Kill talk: Pete Hegseth and the language of war

    America's war against Iran has revealed plenty of gunslinging, provocative rhetoric from the US defence secretary Pete Hegseth. But is there much to learn about America's aims in Iran from Trump's self-described 'secretary of war'?   Reporter/Producer: Alexi Mostrous and Ada Barumé Artwork: Blythe Walker Sibthorp Sound design: Dominic Delargy Editor: Jasper Corbett

    33 min • S1, E352

  • Alexi Mostrous
    Sibling revelry: DoJ files suggest Ghislaine not the only Maxwell who took Epstein cash

    The disgraced financier showered millions of dollars on his money-obsessed former girlfriend. But did her sister and her sister’s husband also benefit from his riches?

    Sun, 8 Mar 2026

  • Alexi Mostrous
    Rogue Brits: The Orthobros

    Alexi sits down with the reporter of this week's Slow Newscast, Francisco Garcia, to talk about one stop in particular on the road to Putin's frontline, the Orthodox Church. How did a young man from Dunblane end up converting to this ancient form of Christianity? And why are so many young men converting to the Orthodox Church? Producer: Ada Barumé Executive Producer: Matt Russell

    17 min • S1, E350

  • Alexi Mostrous
    The Epstein Files: citizen sleuths examine $1.6bn in financial transactions

    Citizen sleuths are dissecting Epstein’s money trail, picking up where official scrutiny appears to have stalled

    Tue, 3 Mar 2026

  • Alexi Mostrous
    Watching JeffTube: the thousands of audio and video files recorded by Jeffrey Epstein

    Beyond the Epstein files, there are the tapes: thousands of recordings – many of private conversations

    Tue, 24 Feb 2026

  • Alexi Mostrous
    King grants police access to all files, despite courtiers’ cover-up fears

    Palace officials worry that opening up documents for investigation could reveal that senior royal staff turned a blind eye to the former prince’s activities

    Sat, 21 Feb 2026

  • Alexi Mostrous
    ‘The breadcrumb to the larger dinner’: calls mount to widen scope of Andrew investigation

    The Met are carrying out ‘initial inquiries’ into the former prince’s close protection officers as Epstein survivors insist this must be only the beginning

    Fri, 20 Feb 2026

  • Alexi Mostrous
    Epstein files detail ‘Andrew for access’ plans of his ultra-wealthy friends

    Mountbatten-Windsor ‘fed information to his contacts while touring the world at taxpayers’ expense as trade envoy’

    Thu, 19 Feb 2026

  • Alexi Mostrous
    Cash rules everything in the age of money laundering

    Oliver Bullough’s Everybody Loves Our Dollars reveals the criminal tactics and human impact of the shadow economy

    Thu, 12 Feb 2026

  • Alexi Mostrous
    Ghislaine’s riches came from her father, and another fortune from Epstein

    A confidential report by JP Morgan released as part of the Epstein files says inheritance is the main source of her mysterious wealth

    Sun, 8 Feb 2026

  • Alexi Mostrous
    I told a chatbot I was a teenager. Here’s the toxic dating advice it gave me

    The Observer investigates the custom GPTs being modelled on controversial figures of the manosphere, such as self-proclaimed misogynist Andrew Tate

    Thu, 5 Feb 2026

  • Follow

    The Observer
    The Observer Magazine
    The ObserverNew Review
    The Observer Food Monthly
    Copyright © 2025 Tortoise MediaPrivacy PolicyTerms & Conditions