Mongoose Energy

Mongoose Energy was a UK energy supplier which closed down in 2020.

What happened?

• Mongoose Energy Supply Ltd (company number 09253945) held a gas supply licence but never commenced supplying gas to any premises within one year of licence grant.
• On 12 December 2019, the regulator Ofgem issued a notice of revocation of its gas supply licence, with effect from 14 January 2020.
• The reason given: the company “has not within 1 year after the date of the Licence grant commenced the supply of gas to any premises” in the specified area.
• According to Companies House, Mongoose remains an active company (as of filing history) but its licence for gas supply has been revoked.

Key numbers and metrics

• Licence revocation notice publication date: 12 December 2019.
• Licence revocation effective date: 14 January 2020.
• Company incorporation date: 8 October 2014.
• Registered office (as listed): 16 Otley Road, Guiseley, Leeds, England LS20 8AH.

Why it matters for UK businesses

• Although Mongoose Energy did not commence active supply to domestic or business customers under its licence, the case highlights a risk scenario for energy procurement and supplier-selection in the UK: a supplier may hold a licence but fail to roll out operations and then have its licence revoked.
• For businesses considering new or smaller energy suppliers (especially niche or new-entrant firms), this serves as a reminder to check not just the brand/tariff but the licence status, operational history, and the supplier’s track record of actually supplying customers.
• From a supply-chain or vendor-risk perspective: if your business engages (directly or indirectly) with an energy supplier (e.g., as part of a multi-site contract, brokered supply or white-label arrangement) then the failure of the supplier to commence operations could lead to contractual non-performance, delays, or need to recontract—so it should be factored into risk assessments.
• The regulatory safety-net of Ofgem’s Supplier-of-Last-Resort (SoLR) regime primarily helps when a supplier ceases trading with live customers; here the scenario was different (non-operation/licence revocation) but it still underlines the broader regulatory and operational litmus test for suppliers.
• For businesses already under contract with a small supplier: it emphasises vigilance in contract exit/continuity clauses, supplier financial and operational viability, and having contingency plans (e.g., ability to switch supplier if the current one cannot sustain operations).