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Artwork for What We Don't Know

What We Don't Know with Matt Brittin & Hayaatun Sillem

Boxlight Creative Studio
Leadership
Time Management
United Kingdom
Stemettes
The Washing Machine Project
Technology
John Lewis Partnership
WPP
Return To Office
Sleep
House Of Commons
Ubuntu
Truth and Reconciliation Commission
Ofcom
Skills Gap
Education Reform
NESTA
Women In Tech
Personal Growth
Creativity

In a crazy world, how do we get better leaders? This is the boardroom, unplugged. — Whether starting out, or a seasoned leader, you face a world we’ve never seen before - the future of work, politics, technology and society is harder to predict than ever. So how do we survive the uncertainty and thrive in complexity? The successful leaders of the future will need a different set of skills and com... more

PublishesWeeklyEpisodes17Founded4 months ago
Number of ListenersCategories
EducationManagementSelf-ImprovementBusiness

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Artwork for What We Don't Know

Latest Episodes

This week, a special crossover episode: Jimmy's Jobs of the Future meets What We Don't Know.

Hayaatun Sillem spent eight years as CEO of the Royal Academy of Engineering - the first woman, and the first person in over two decades, to hold the role. ... more

What Washing Machines Teach Us About Leadership | Navjot Sooni & The Washing Machine Project

This time Hayaatun is joined by Navjot Sawhney, founder of The Washing Machine Project, about how engineering and leadership intersect through a mission to ... more

Joe Garner (Ex-CEO Nationwide) on Leading Through Crisis, Values-Driven Culture & Sustainable Performance

Hayaatun interviews Joe Garner, former CEO of Nationwide Building Society (and previously at HSBC and Openreach), now an advisor to CEOs across... more

Women in tech, AI bias, gender inequality, and the future of work

Dr Anne-Marie Imafidon pulls no punches. Child prodigy, STEMettes founder, Countdown arithmetician, and government adviser on women in technology.

She built STEMettes from £300 to £1... more

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Recent Guests

Navjot Sooni
Founder of the Washing Machine Project and advocate for frugal, impact-focused engineering
The Washing Machine Project
Episode: From Leaving Dyson to The Washing Machine Project | Navjot Sawhney
Joe Garner
Former CEO of Nationwide Building Society
Nationwide Building Society
Episode: Why Coachability Beats Talent (And It Costs Your Promotions) | Nationwide former CEO Joe Garner
Anne-Marie Imafidon
Founder of STEMettes; advocate for women in tech; Chancellor at Glasgow Caledonian University
STEMettes; Glasgow Caledonian University
Episode: The Tech Industry Forgot That Women Exist | Dr Anne-Marie Imafidon
Ravi Gurumurthy
CEO of Nesta, leader in behavioral insights and innovation
Nesta
Episode: What David Miliband & The Nudge Unit Taught Me About Leadership | Ravi Gurumurthy, Nesta CEO
Hetti Barkworth-Nanton
CEO of Ploughshare, Chair of Refuge, campaigner for domestic abuse awareness
Ploughshare; Refuge
Episode: Why The Best Leaders Don't Need To Prove Themselves | Hetti Barkworth-Nanton
Andy Haldane
Chancellor of the University of Sheffield, President of the British Chambers of Commerce
British Chambers of Commerce; University of Sheffield
Episode: Andy Haldane: The Jobs Crisis & How to Rebuild UK Skills | What We Don't Know
John Browne
Lord Browne of Manningley, former CEO of BP
BP (former) / The Courtauld Institute / Francis Crick Institute
Episode: What Negotiating With Putin & Gaddafi Taught Me About Leadership | Lord John Browne
Sharon White
Baroness Sharon White, former chair of the John Lewis Partnership and former chief executive of Ofcom
John Lewis Partnership; Ofcom
Episode: Ex John Lewis Boss: Why The Best Leaders Are Impossible to Read | Sharon White
Paul Fonsell
Executive Secretary to the Truth Commission and founder of the Conduit
International Centre for Transitional Justice; The Conduit
Episode: Mandela’s Secret Weapon: How Empathy Can Topple a Dictator

Hosts

Hayaatun Sillem
Host of What We Don't Know; co-host; involved with Boxlight Creative Studio; leadership-focused moderator.
Matt Brittin
Host of the show; long-time technology industry leader; co-host; often guides conversations with practical leadership frameworks.

Reviews

4.9 out of 5 stars from 7 ratings
  • Terrific

    Loved the discussion, the glimpses of what shaped Matt, the focus on people and the acknowledgement that truly listening and willingness to learn from everything is the default setting for leadership not to be used as a reset from time to time.

    Apple Podcasts
    5
    cmrs24
    United Kingdom4 months ago

Listeners Say

Key themes from listener reviews, highlighting what works and what could be improved about the show.

Hosts create a thoughtful, human-centered conversation about complexity.
Great mix of personal stories and big-picture insights.
Thoughtful leadership discussion with practical takeaways.
Guest line-up offers high-profile but deeply relevant perspectives.

Chart Rankings

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Talking Points

Recent interactions between the hosts and their guests.

Why Coachability Beats Talent (And It Costs Your Promotions) | Nationwide former CEO Joe Garner
Q: Is everyone coachable, and why is coaching different from feedback?
Coaching focuses on developing future skills and capabilities, while feedback assesses current performance; both are important but serve different purposes for growth.
Why The Best Leaders Don't Need To Prove Themselves | Hetti Barkworth-Nanton
Q: How did your experiences with trauma influence your leadership approach and purpose?
Trauma and later cancer reshaped her, pushing toward authentic leadership, systemic impact, and campaigns that balance organizational roles with social advocacy.
Why The Best Leaders Don't Need To Prove Themselves | Hetti Barkworth-Nanton
Q: What early experiences sparked your leadership and sense of responsibility?
Her rural, challenged upbringing, family dynamics, and a pivotal strawberry-field commitment story taught her about reliability, accountability, and the importance of showing up.
Why The Best Leaders Don't Need To Prove Themselves | Hetti Barkworth-Nanton
Q: Could you tell us what your two main leadership roles are and what they're about?
She leads Ploughshare, applying defence-origin innovations to civilian markets, and chairs Refuge, focusing on domestic abuse services and advocacy, with a throughline of social impact.
Andy Haldane: The Jobs Crisis & How to Rebuild UK Skills | What We Don't Know
Q: What was one of the most challenging crises you faced and what did you learn from it?
He describes the global financial crisis as a moment requiring imagination and cross-disciplinary thinking, teaching him that preparation and listening across sectors are essential to crafting effective responses.

Audience Metrics

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Frequently Asked Questions About What We Don't Know

What is What We Don't Know about and what kind of topics does it cover?

A leadership-focused series that centers on real-world stories from top executives and leaders navigating uncertainty across business, technology, government, and society. Episodes mix personal journeys with practical lessons on purpose, culture, stakeholder management, and humane, values-led leadership in complex environments. Notable strengths include high-profile guest voices, candid discussions about transformation, and actionable frameworks for leading with empathy, clarity, and accountability in a fast-changing world.

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How many listeners does What We Don't Know get?

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Which podcasts are similar to What We Don't Know?

These podcasts share a similar audience with What We Don't Know:

1. The News Agents
2. Newscast
3. The Rest Is Politics
4. The News Agents - USA
5. The Rest Is Money

How many episodes of What We Don't Know are there?

What We Don't Know launched 4 months ago and published 17 episodes to date. You can find more information about this podcast including rankings, audience demographics and engagement in our podcast database.

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What guests have appeared on What We Don't Know?

Recent guests on What We Don't Know include:

1. Navjot Sooni
2. Joe Garner
3. Anne-Marie Imafidon
4. Ravi Gurumurthy
5. Hetti Barkworth-Nanton
6. Andy Haldane
7. John Browne
8. Sharon White

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