Some things cannot be taught, they have to be felt.
Mainstream Doesn't Work
We Are Sidestream
What Sidestream Does
Our Mission
Why we built Sidestream the way we did, in 52 seconds. Some things cannot be taught, they have to be felt.
Our Story
Sidestream started with a frustration. We had both spent years watching well-meaning training programmes leave no trace. People nodded in the room and forgot by the weekend. The science said one thing, the slide deck said another, and the slide deck always won. We were tired of watching it.
So we built something different. The rigour of organisational psychology and the craft of immersive theatre, two worlds that almost never meet, in the same room. The result: live, scripted behavioural experiences that participants are still describing months later.
Based in London, Milan and Berlin (hybrid). Working across Europe and globally, public sector to scale-ups, healthcare to creative industries.
The Training Iceberg
The four levels of training impact (Kirkpatrick, 1959) form an iceberg. Above the waterline sits everything most organisations actually measure: did they enjoy it? and can they pass a quiz? Below sits everything that matters to the business: did anyone change how they behave? and did the result move?
Most L&D programmes never go below the waterline, not because the levels are unknown, but because reaching them is genuinely hard. This is precisely where Sidestream operates.
↓ Most L&D stops at Level 1–2. Sidestream goes deeper. ↓
We Are Sidestream
Forget questionnaires, tick-box exercises and passive learning. Real change happens through visceral, under-the-skin experiences that create lasting memories. We craft immersive, evidence-based environments that provoke sustainable behavioural shifts.
Trusted by
Sectors We Work In
Behaviour change is the same science everywhere. The context that surrounds it is never the same twice.
Met Police · HM Courts & Tribunals
Innocence Project · Forensic Psychology Unit
UCL · Imperial · Cambridge · Goldsmiths · Bocconi
TCS · Financial services · Tech scale-ups
High-stakes operations · resilience training
Mental health awareness · clinical leadership
Different sector? Tell us your context →
Leaders on Culture, Learning & Behaviour Change
Leaders running the world's most adaptive organisations return to the same idea: culture, behaviour and learning beat strategy decks. Here's how four of them put it.
I really need to bring a 'learn-it-all' culture, not a 'know-it-all' culture.
If you have an honest, transparent culture, you'll have higher engagement, you'll have less turnover, you'll get better business results.
Lead with context, not control. Tell people what they need to know, then trust them to make the decisions.
If you don't have a strong culture, your company will eventually slip. You really have to define what you stand for, and then defend it relentlessly.
These are the operators we agree with, and the science behind their intuition is the same science we build into every Sidestream programme. See the six research frameworks we use.
What Participants Say
What sticks after the room empties, in their own words.
An 80s punk gig as a masterclass in leadership and reputation management? Pure genius.
When else can you have an honest talk with someone living with a serious mental health condition, except through immersive theatre?
A gripping and thought-provoking experience that made me reflect on how much, or how little, has changed for women in the workplace and beyond.
The judges loved the creative approach to building awareness, well executed and an excellent mix of theatre and immersive work.
You make every wrong call in the safe version. By Monday morning you know what not to do, and what does work. Cheap learning, real value.
Two days, more usable ideas than the previous quarter. The unexpected framing did the work, and our team has stopped saying "let's brainstorm" with that sigh.
What We Offer
From a 90-minute workshop to a three-day simulation, six ways we get behaviour to actually move.
Hands-on sessions for close-knit teams. Real situations, useful tools, observable behaviour change, not slide-clicks.
See workshop formatsAward-winning theatre-based experiences for large audiences. The Death of Jane Doe, The Accused, Top of the Cops, lessons that stick.
See the eventsMulti-day strategic simulations where leadership teams live a transformation, crisis or restructure first, then launch with confidence.
Inside the Sellafield simulationBehavioural coaching for leaders and managers. Real-time feedback, deliberate practice, sustained reinforcement, not pep talks.
How coaching worksValidated diagnostics, leader interviews, climate data. A measurable baseline before any intervention, so we know what actually moved.
What the diagnostic uncoversFor bespoke interventions, get in touch and we'll tailor-make exactly what you're looking for around your sector and goals.
Tell us what you needOur Model
Case Studies
Watch the Trailer · 3 min
No passive lectures. Just engaging, surprising and playful learning that gets under the skin, because we remember what makes us feel alive.
London, Borough by Borough
Sidestream is registered at 58 Malden Road, NW5 3HG, in the London Borough of Camden. We work across every London borough, with detailed working knowledge of four specific geographies. Each guide below runs to roughly 5,000 words.
HQ Borough
Creative agencies, the Kings Cross tech cluster, UCL and Bloomsbury, UCLH and Royal Free, Camden Council.
Read the Camden guide →Financial Services
Banks, Lloyd's market insurance, Magic Circle law firms, Big-4, asset managers, the FCA conduct-and-culture agenda.
Read the City guide →Banking, Big-4 & Tech
HSBC, Barclays, Citi, JPM, KPMG, EY, PwC, Reuters, the Wharf tech cluster, the Elizabeth Line effect.
Read the Canary Wharf guide →Civil Service
UK Civil Service, Whitehall departments, the Metropolitan Police anchor relationship, the CCS RM6224 framework.
Read the Westminster guide →Sector specialists
Three sectors where Sidestream has the deepest verified-client relationships and the most calibrated method. Each guide runs to roughly 5,000 words.
Metropolitan Police anchor
UK police-sector behaviour change anchored by the Met Police relationship, with The Death of Jane Doe and Top of the Cops productions. Post-Casey workforce reform, BlueLight Commercial procurement.
Read the police guide →UCL, Cambridge, Bocconi anchor
UK higher-education leadership development with verified clients UCL, Cambridge, Bocconi, Goldsmiths, Imperial. Academic leadership, EDI, sexual misconduct response, decolonisation.
Read the university guide →Compassionate leadership
NHS trusts and ICSs. Michael West compassionate leadership, Francis Report speak-up culture, NHS People Plan, WRES/WDES, NHS Sexual Safety Charter.
Read the NHS guide →London Services, Specific Searches
Deep working guides for the three most-searched London training procurement questions. Each guide runs to roughly 5,000 words with costs, scope, comparison and process.
From £15,000 / cohort
Not escape rooms or cooking classes. Bespoke immersive team workshops that produce measurable behaviour change. Six rehearsable team behavioural targets.
Read the team workshop guide →From £15,000 / cohort
Five programme formats from half-day to enterprise. Edmondson, Kolb, Ericsson, COM-B, Kirkpatrick foundations. Verified clients including Met Police, UCL, Cambridge.
Read the leadership guide →From £15,000 / cohort
Bespoke behaviour-change training across all corporate categories. Comparison with business schools, big consultancies, off-the-shelf franchises, coaching firms, e-learning.
Read the corporate guide →From £15,000 / cohort
Bespoke change-leadership programmes. Kotter, Bridges, Lewin anchored. Rehearse the actual change conversations leaders have to lead.
Read the change guide →From £15,000 / cohort
Rehearsed with a professional actor ensemble playing the actual audience you face. Ericsson deliberate practice anchored.
Read the presentation guide →From £15,000 / cohort
The Sidestream core method. Scripted scenarios performed by professional actors. Award-winning, evidence-led.
Read the simulation guide →From £15,000 / cohort
Edmondson-anchored team behavioural development. Project Aristotle findings applied. Beyond team-bonding.
Read the team dynamics guide →From £15,000 / cohort
Rehearsed decision-making under pressure. Kahneman bias-recognition, Janis groupthink-counter. Eight biases addressed.
Read the problem-solving guide →From £15,000 / cohort
Change resilience and team resilience rehearsed. Michael West compassionate leadership, Edmondson psychological safety.
Read the resilience guide →From £15,000 / cohort
The behavioural patterns hybrid teams need. The hybrid meeting that prevents two-tier participation, asynchronous coordination, distributed leadership.
Read the hybrid guide →UCL, Cambridge, Bocconi anchor
The academic-anchored consultancy. Edmondson, Kahneman, Kolb, Michie, Hackman, West applied to workplace behaviour change.
Read the OB guide →100-300 person events
Award-winning productions for conferences, all-hands events, away days. The Death of Jane Doe, The Accused, Top of the Cops.
Read the large-group guide →From £25,000 / cohort
C-suite, board and senior executive behaviour change. Top of the Cops production for sceptical senior cohorts.
Read the executive guide →The Accused anchor
Bespoke immersive EDI behaviour change. The Accused Goldsmiths Award production. Charter-mark integration (Athena Swan, WRES, WDES, Stonewall).
Read the DEI guide →Edmondson 1999 anchor
Edmondson framework operationalised. Validated 7-item scale plus Kirkpatrick Level 3 dual measurement. Six behavioural targets.
Read the psych safety guide →Worker Protection Act 2024
All-reasonable-steps duty compliant. EHRC statutory guidance aligned. Behavioural evidence trail at Kirkpatrick Level 3.
Read the harassment prevention guide →Manager-as-coach
GROW (Whitmore), OSKAR (McKergow and Jackson), CLEAR (Hawkins) frameworks operationalised through professional-actor immersive rehearsal.
Read the coaching guide →The Death of Jane Doe anchor
CorpComms Award production. Francis Report response, Freedom to Speak Up architecture, NHS Sexual Safety Charter aligned.
Read the speak-up guide →100-300 person events
Award-winning corporate theatre productions. Annual conferences, all-hands events, away days. Roundhouse, KOKO, Trinity Buoy Wharf venues.
Read the immersive events guide →SPIN, MEDDIC, Sandler, Challenger
Bespoke behavioural training for sales teams. Rehearses the actual sales conversations with professional actors playing buyer roles.
Read the sales team guide →Strategic sales-leadership
Sales-leadership strategic development through behavioural rehearsal. Go-to-market design, transformation strategy, account strategy.
Read the sales strategy guide →COM-B + EAST frameworks
Apply COM-B (Michie/van Stralen/West), EAST (Dolan), behavioural economics (Kahneman, Thaler, Sunstein) to organisational behaviour design.
Read the behavioural design guide →Stop talking at people.
A 30-minute call beats anything we could write here. Get in touch today.
