ISG’s Collapse Leaves Seventynine Lighting with £2m Unpaid Debt

The recent failure of ISG, a leading name in construction contracting, exemplifies this impact as its insolvency forced one of its key subcontractors, Seventynine Lighting, to close operations. Based in Gloucestershire, Seventynine Lighting had built a successful track record with clients like Selfridges and Regus, specialising in commercial lighting solutions. However, ISG’s financial collapse left the subcontractor with nearly £2 million in uncollectible debts, an insurmountable loss that forced it into administration.

The ISG and Seventynine Lighting connection

ISG’s financial collapse in September 2024 had immediate consequences for subcontractors like Seventynine Lighting, a company founded in 2006 with a history of profitable operations. Seventynine had long been a valued subcontractor for ISG, handling lighting installations across retail and office spaces. When ISG entered administration, Seventynine found itself holding nearly £2 million in uncollectible invoices, forcing the company to cease operations and lay off 30 employees.

Forvis Mazars was appointed as Seventynine’s administrator in October. According to joint administrator Mark Boughey, Seventynine’s insolvency reflects the substantial risks subcontractors face when primary contractors encounter financial difficulties. In the construction industry, where project payments and cash flow are tightly linked to client solvency, subcontractors often have few options when a major contractor fails​.

The broader financial impact on ISG’s supply chain

The effects of ISG’s collapse extended beyond Seventynine Lighting, impacting numerous subcontractors in its supply chain. Ernst & Young (EY), ISG’s administrator, estimated more than £190 million in losses for ISG’s suppliers, with many likely unable to recover any outstanding payments.

EY’s early assessments noted that even ISG’s primary subsidiary, ISG Fit Out Ltd, has yet to fully disclose the total owed to subcontractors, suggesting that losses across the chain could increase. Subcontractors in construction, particularly those with single-client dependencies, can face immediate and severe repercussions from client insolvencies—a reality underscored by ISG’s extensive impact on its supply chain​.

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