Thermogram of a well-insulated building (Passivhaus), with traditional building in background.

Super-insulate the UK’s homes to cut energy bills, reduce fuel poverty, create jobs, drive down CO2 emissions and strengthen national energy security.

Secure data

Protect personal data held in trust for your customers to serve them better, reduce risk, work flexibly and stay legal. Can even reduce CO2.

Growing short rotation willow on waste ground is a good source of bio-fuel.

Produce sustainable energy to generate revenue, reduce costs, manage risk, slow climate change and improve national security.

Be far-seeing, fast and flexible to thrive amid global shocks – like a knight on a draughts board. Learn the skills of adaptive planning.

Leaven aims to multiply good business which is also good for people and for the environment. This principle governs the kinds of work we choose to do. Please explore our site to find out more. If you have questions or think we might work together, don’t hesitate to contact us.