Tiered Pricing Structure definition

Tiered Pricing Structure means a tariff that charges one unit rate (in pence per kilowatt hour) for the initial amount of energy You use (the first tier) and then a second cheaper rate for the remaining amount (second tier)”.
Tiered Pricing Structure means a tariff that charges one unit rate (in pence per kilowatt hour) for the initial amount of energy You use (the first tier) and then a second cheaper rate for the remaining amount (second tier) (from Page 3 of the pre 18.11.17 T&Cs booklet on website).