BLOCK ONE®

    Energy

    Energy procurement, market strategy and infrastructure optimisation delivered from the client side of the table. Full fee transparency. Clear advice and effective execution.

    Mark Corne — Managing Director, Energy

    Division Lead

    Mark Corne

    Founding Partner & Managing Director — Energy

    Mark is a Founding Partner at Block One specialising in energy procurement and market strategy. Prior to joining Block One as a Founding Partner, he spent over 15 years navigating the UK energy market from the customer's side — not the supplier's. He's built a career on stripping back the noise, educating clients on what actually matters, and delivering procurement outcomes that align to business strategy rather than broker incentives.

    From meter installations to portfolio-wide procurement frameworks, Mark operates across the full energy lifecycle. His deep technical knowledge of gas, electricity, water and renewables is matched by a commercial instinct that ensures every recommendation stands up to financial scrutiny.

    At Block One, he runs the energy division with a straightforward philosophy: sit on your side of the table, call it how it is, and make sure you're buying with confidence — not confusion. No basket-first thinking, no conflicted fee structures, no volume promises that don't stack up. Just relentless focus on your competitive advantage.

    Founders' Combined Career Track Record

    15+

    Years in energy procurement

    £2bn+

    Career energy spend

    100+

    Client portfolios optimised

    What We Do

    Core Capabilities

    Customer-Side Advisory

    We work for you, not the supplier. No hidden margins, no conflicted interests. We call a spade a spade and use deep market experience to cut through the noise and get you unrivalled outcomes.

    Market & Technical Expertise

    Extensive technical and market knowledge combined with commercial thinking. Sometimes the simplest product is the right one — sometimes it isn't. We know the difference and we'll tell you straight.

    Strategy-Led Procurement

    Less cookie-cutter aligned to a broker's goals, more how do we align to your business strategy. We build procurement frameworks around your objectives, not ours.

    Education & Simplicity

    Clients get thrown into baskets without anyone asking where their strategy sits — then sold flexible hedging because it pays higher fees, not because it's right. We strip it back, educate you through the process, and make sure you're buying with confidence — aligned to your goals, not someone else's.

    Base Review

    On average, over £25,000 in year 1 value delivered.

    Our fixed-price, fixed-scope, fully virtual diagnostic — senior-led and conducted over a couple of days. £4,800 + VAT — credited in full against any subsequent Transform engagement (not credited against Perform). More detailed / bespoke Reviews available on a POA basis.

    Book a Review

    £4,800

    + VAT · Credited against Transform

    Ongoing support

    Need ongoing energy management?

    Our Perform Energy Services provide continuous procurement, compliance and performance optimisation — embedded on your side of the table.

    Explore Energy Services

    District Energy

    Tariff setting & district energy management

    Independent, customer-side management of communal heat and district energy schemes — tariff setting, S20 and HNR compliance, resident communication and tri-party structuring.

    District Energy Services

    Frequently Asked

    Energy Procurement FAQ

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