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We help ambitious leaders make the decisions that matter — and see them through.
From strategy to execution, ● Plenstone brings rigorous analysis, deep sector insight and senior attention to every engagement. Discover how we turn complex problems into measurable performance.

SELECTED ENGAGEMENTS

AI Operating Model for a Professional Services Firm

2023
TECHNOLOGY & AI

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Technology
June

Performance Reporting Rebuild for a Family Office

2022
PERFORMANCE

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Family Office
July

Technology Modernisation for a Hospitality Business

2023
TECHNOLOGY

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Technology
January

Commercial Due Diligence for a Private Investor

2022
TRANSACTIONS

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Strategy
September

ABOUT US

What we stand for
Plenstone exists to help organisations perform at the level their ambition demands. We bring the analytical rigour and independence of a top-tier strategy firm to leaders who want a partner, not a report — one that is accountable for outcomes, present in the detail and candid when it counts.
How we work
Every engagement starts with the question that actually matters, not the one that is easiest to answer. We size the prize, test the assumptions and build the fact base with your team, so the recommendation is owned before it is presented. ● Then we stay. From operating model to implementation cadence, we work alongside your leaders until the change is embedded and the results are visible in the numbers.

PRINCIPLES

PRINCIPLES

PRINCIPLES

PRINCIPLES

PRINCIPLES

PRINCIPLES

WHAT GUIDES US
Six commitments shape every engagement we take on. They are how we choose our clients, build our teams ● and measure our own performance — long after the final presentation.

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INDEPENDENCE

We have no products to sell and no vendors to favour. Our only interest is the quality of your decision — which is why our advice is sometimes unwelcome and always unvarnished. Independence is the condition that makes trust possible.

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RIGOUR

Opinions are cheap; evidence is not. We build the fact base before we form the view — market data, unit economics, customer truth and operational reality — and we show our work so that your board can challenge it.

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SENIOR ATTENTION

The people who win the engagement do the engagement. Our senior team stays in the detail from the first workshop to the final handover, because judgement cannot be delegated.

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IMPACT, NOT OUTPUT

A recommendation that is not implemented is a cost, not a result. We define success in the client's numbers — revenue, margin, speed, risk — and we stay until those numbers move.

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DISCRETION

Our clients trust us with their most sensitive questions. We protect that trust absolutely: no client names on our website, no case material without consent, no conflicting mandates.

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CANDOUR

We would rather lose an engagement than tell a client what they want to hear. Clear, direct and early is how difficult truths become manageable decisions.

HOW WE ENGAGE
Every client situation is different. We shape the engagement around the decision in front of you — not around a standard programme.
Formats
DIAGNOSTIC
Strategic Review
4–6 weeks
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TRANSFORMATION
Performance Programme
6–18 months
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ADVISORY
Board & Founder Advisory
Ongoing retainer
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