Warmfront, JJ Crump, and South Coast Insulation Services
On 22 April 2026, the SFO announced a new investigation into three UK companies that worked on Energy Company Obligation 4 (ECO4) contracts.
On 22 April 2026, the SFO announced a new investigation into three UK companies that worked on Energy Company Obligation 4 (ECO4) contracts between 2022 ans 2024: Warmfront, JJ Crump and South Coast Insulation Services.
Investigators made four arrests and searched six properties across the UK, including in Cannock, Chilworth, Killamarsh, Southwell, and Wolverhampton.
Case Timeline
22 April 2026 – SFO investigation announced. Six properties searched and four individuals arrested in the UK on suspicion of fraud in connection with three companies who worked on Energy Company Obligation 4 (ECO4) contracts.
Request for information
The Serious Fraud Office would like to hear from you if you have information about the three companies being investigated in connection with Energy Company Obligation 4 (ECO4) projects between 2022 and 2024:
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Warmfront (Cannock)
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JJ Crump (Yorkshire)
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South Coast Insulation Services (Fareham)
Any information shared will be treated in confidence. Contact us via email confidential@sfo.gov.uk.