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“Big 6” means the six major energy companies who currently supply over 98% of UK households, comprising British Gas, Powergen, NPower, EDF (London Electricity, Seeboard and SWEB), Scottish Power and Scottish & Southern Energy. The Utility Warehouse Guarantee and price comparisons are based on the standard domestic usage profiles published by energywatch for low, medium and high users on a like-for-like basis, and exclude Club Membership fee, Multi-Service “Cashback”, surcharge for gas customers using an Independent Gas Transporter, Dual-Fuel discounts and online tariffs. Only applies to direct debit customers.
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