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When comparing suppliers, we understand that a common concern is the likelihood of suppliers changing thier prices. In this respect it is useful to know when the company you propose to switch to last changed thier prices.
Accordingly, we have provided the table below detailing all price changes of all UK suppliers over the last 12 months, so that your switch decision is more informed. The table also provides details of when we applied these changes as welll as when they actually came into affect.
All changes shown have been incorporated into our calculator, so you can be assured that you are always viewing the very latest prices.
Date when last update applied: 8th May 2008
| Supplier | Date Updated | Date Effective | Details |
| E.ON | 08.05.2008 | 08.05.2008 | v4 of the Guarantee range of tariffs replaced with v5. |
| EDF Energy | 07.05.2008 | 07.05.2008 | Removal of Fixed Price 2009 tariffs from sale. |
| British Gas | 02.05.2008 | 02.05.2008 | Price Protection 2009 removed from sale |
| British Gas | 02.05.2008 | 02.05.2008 | Click Energy 5 electricity prices reduced. Effective existing customers 8th May 2008 |
| Green Energy | 01.05.2008 | 01.05.2008 | Launch of Pale Green and Deep Green Energy tariffs. |
| Spark Energy | 01.05.2008 | 01.05.2008 | Launch of new standard prices |
| npower | 28.04.2008 | 28.04.2008 | Removal of Sign on Line 10 and launch of Sign On Line 11 |
| npower | 14.04.2008 | 14.04.2008 | Introduction of discounts for quarterly direct debit customers. |
| npower | 14.04.2008 | 14.04.2008 | Launch of the ONE tariff for dual fuel customers |
| Spark Energy | 02.04.2008 | 02.04.2008 | Removal of all discounted tariffs from sale. |
| Telecom Plus | 01.04.2008 | 01.04.2008 | Updated electricity prices |
| Ecotricity | 01.04.2008 | 01.04.2008 | Updated prices in three distribution areas |
| EBICo | 28.03.2008 | 28.03.2008 | Gas prices increased by 12.09% and electricity prices increased by an average of 14.84% |
| Scottish and Southern Energy | 20.03.2008 | 20.03.2008 | Gas prices increased by 15.8% and electricity prices by 14.2% |
| E.ON Energy | 18.03.2008 | 18.03.2008 | Removal of EnergyOnline Extra Saver 5 and replacement with EnergyOnline Extra Saver 6 |
| EDF Energy | 04.03.2008 | 04.03.2008 | Removal of Energy Online v5.1 |
| British Gas | 04.03.2008 | 04.03.2008 | Update of Market Tracker rates in accordance with the tariff rules |
| npower | 18.02.2007 | 18.02.2008 | Sign Online version 9 removed from sale and replaced with Sign Online version 10 |
| ScottishPower | 11.02.2008 | 11.02.2008 | Removal of Online Energy Saver 4 and Online Energy Saver Green Fund as an available tariff. |
| British Gas | 08.02.2008 | 08.02.2008 | Click Energy 4 withdrawn and replaced with Click Energy 5 |
| E.ON | 07.02.2008 | 07.02.2008 | Launch of EnergyOnline Extra Saver V5 tariffs. |
| ScottishPower | 01.02.2008 | 02.02.2008 | Launch of new Fixed Price tariff, fixed to 28th February 2011 |
| ScottishPower | 01.02.2008 | 02.02.2008 | Increase in standard gas prices by 15% and standard electricity prices by 14% |
| Union Energy | 02.02.2008 | 02.02.2008 | Gas and electricity prices on average by 14% |
| Good Energy | 28.01.2008 | 01.02.2008 | New tariffs released, average increase 13.2% |
| Telecom Plus | 01.02.2008 | 01.02.2008 | Gas prices increased by an average of 12% and electricity prices by an average of 7% |
| Scottish Power | 24.01.2008 | 24.01.2008 | Launch of Discounted Energy tariff as a dual fuel and electricity only tariff. |
| Sainsbury's Energy | 15.01.2008 | 18.01.2008 | Gas and electricity prices increased by 12.9% |
| EDF Energy | 18.01.2008 | 18.01.2008 | Online Energy v1.6, v2.4, v3.4 and v4.4 updated |
| British Gas | 18.01.2008 | 18.01.2008 | Gas and electricity prices increased by 15% |
| British Gas | 21.01.2008 | 18.01.2008 | Launch of Price Protection February 2009 |
| EDF Energy | 15.01.2008 | 15.01.2008 | Standard gas and electricity prices increased by 12.9% and 7.9% respectively. |
| Ecotricity | 14.01.2008 | 14.01.2008 | New prices launched for New Energy and New Energy plus |
| E.ON | 09.01.2008 | 09.01.2008 | Launch of EnergyOnline Extra Saver 4, ElectricityOnline Extra Saver 4 and EnergyOnline Extra Saver Standing Charge 4 - all with an extra saver discount until at least 1 April 2009 |
| ScottishPower | 08.01.2008 | 08.01.2008 | Removal of PriceFall tariffs as customer allocation now complete. |
| npower | 05.01.2008 | 05.01.2008 | All standard prices increased on average by 17.2% for gas and 12.7% for electricity |
| npower | 05.01.2008 | 05.01.2008 | Price Fix 2011 launched for dual fuel and electricity only. |
| E.ON | 03.01.2008 | 03.01.2008 | Reduction in the surcharge applicable to prepayment gas age concern and standard customers effective immediately for new customers and from 08.01.2008 for existing. |
| Good Energy | 03.01.2008 | 03.01.2008 | Decision taken to no longer supply customers with a pre-payment tariff. |
| Southern Electric | 28.12.2007 | 28.12.2007 | Removal of Price Fix 2008 On-line tariff for new customers. |
| SWALEC | 28.12.2007 | 28.12.2007 | Removal of Price Fix 2008 On-line tariff for new customers. |
| Scottish Hydro-Electric | 28.12.2007 | 28.12.2007 | Removal of Price Fix 2008 On-line tariff for new customers. |
| E.ON | 20.12.2007 | 20.12.2007 | Fiex Price 2009 removed from sale. |
| E.ON | 18.12.2007 | 18.12.2007 | Energy Guarantee v4 launched as a dual fuel tariff. |
| E.ON | 18.12.2007 | 18.12.2007 | Electricity Guarantee v4 and Gas Guarantee v4 launched as single fuel tariffs. |
| npower | 17.12.2007 | 17.12.2007 | Sign Online v9 launched and Sign Online v8 withdrawn from sale. |
| ScottishPower | 06.12.2007 | 06.12.2007 | Removal of Marks and Spencer voucher offer from Online Energy Saver 4 |
| Green Energy UK | 05.12.2007 | 05.12.2007 | Prices of Green Energy 100 and Green Energy +10 reduced |
| Powergen | 05.12.2007 | 05.12.2007 | Launch of Price Protection V13 as a capped price dual fuel and electric only tariff. Capped to 1st October 2009. |
| British Gas | 04.12.2007 | 04.12.2007 | Update of Market Tracker rates in accordance with the tariff rules |
| Spark Energy | 01.12.2007 | 01.12.2007 | Launch of Direct Discount tariff for gas, electricity and dual fuel. |
| Southern Electric | 12.11.2007 | 12.11.2007 | Launch of better plan tariff. |
| Scottish Hydro Electric | 12.11.2007 | 12.11.2007 | Launch of better plan tariff. |
| SWALEC | 12.11.2007 | 12.11.2007 | Launch of better plan tariff. |
| Utilita | 01.09.2007 | 01.11.2007 | New prices for all tariffs, effective for new customers immediately. |
| Spark Energy | 22.10.2007 | 22.10.2007 | Two new discounted tariffs launched. |
| Spark Energy | 11.10.2007 | 11.10.2007 | Reduction in both gas and electricity prices |
| Scottish and Southern Energy | 09.10.2007 | 09.10.2007 | Update of Price Fix 2008 Internet tariffs across all areas. Average reduction of 1.2% applies to new and existing customers. |
| British Gas | 09.10.2007 | 09.10.2007 | Update of Click Energy 4 prices. |
| Powergen | 08.10.2007 | 08.10.2007 | Electricity Guarantee v3 and Gas Guarantee v3 launched as single fuel tariffs. |
| Powergen | 08.10.2007 | 08.10.2007 | Energy Guarantee v3 launched as a dual fuel tariff. |
| British Gas | 03.10.2007 | 03.10.2007 | Update of Click Energy 4 prices. |
| British Gas | 01.10.2007 | 01.10.2007 | Click Energy 4 launched |
| Scottish Hydro Electric | 28.09.2007 | 28.09.2007 | Price Fix 2008 Internet launched as a dual fuel tariff. |
| SWALEC | 28.09.2007 | 28.09.2007 | Price Fix 2008 Internet launched as a dual fuel tariff. |
| Southern Electric | 28.09.2007 | 28.09.2007 | Price Fix 2008 Internet launched as a dual fuel tariff. |
| Powergen | 27.09.2007 | 27.09.2007 | Launch of version 3 of EnergyOnline Extra Saver as a dual fuel tariff. |
| British Gas | 20.09.2007 | 20.09.2007 | Removal of Discounted Energy for sale. Existing customers unaffected. |
| Powergen | 10.09.2007 | 10.09.2007 | New Age Concern High User tariff launched. |
| Scottish Hydro-Electric | 31.08.2007 | 31.08.2007 | New Online range of tariffs launched. |
| SWALEC | 31.08.2007 | 31.08.2007 | New Online range of tariffs launched. |
| Southern Electric | 31.08.2007 | 31.08.2007 | New Online range of tariffs launched. |
| npower | 24.08.2007 | 24.08.2007 | Sign Online version 8 launched today as both an offline and online tariff. |
| Powergen | 20.08.2007 | 20.08.2007 | New Fixed 2009 dual fuel and electricity only tariff launched. |
| British Gas | 31.07.2007 | 31.07.2007 | Zero Carbon launched as a dual fuel renewable energy tariff |
| British Gas | 31.07.2007 | 31.07.2007 | Future Energy launched as an electricity only renewable energy tariff |
| npower | 21.07.2007 | 21.07.2007 | Sign online - paperless billing launched |
| British Gas | 21.07.2007 | 21.07.2007 | Tracker tariffs launched |
| Powergen | 16.07.2007 | 16.07.2007 | Energy Online Extra Saver Standing Charge launched today |
| Good Energy | 01.07.2007 | 15.07.2007 | Revised Economy 7 prices, average decrease of 5.8% across the UK |