Concentration of the electricity generation market in the UK is low, especially relative to the EU average. However, in response to concerns specifically about market liquidity, Ofgem obliged the six largest vertically-integrated suppliers to publish prices at which they will buy and sell a range of forward power products. It also requires the eight largest generating companies to follow certain specific rules when trading with small independent suppliers.
Gas market concentration in the UK is also low, with the largest market share of physical and traded activity below 8%. The wholesale gas market includes both over-the-counter and exchange based trading (ICE and ICE Endex).
Wholesale electricity prices are above the EU average while wholesale gas prices are below the EU average. At retail level, six major suppliers share 90-95% of the market. The price paid by domestic customers for electricity and gas, including all taxes and levies, is below the EU28 average. This is due, at least in part, to a 5% VAT rate for domestic energy supplies.
The government has committed to replacing all gas and electricity meters with smart meters in domestic households in Great Britain by the end of 2020. Roll-out is underway with over 1.5 million smart and advanced meters installed as of March 2015).
Both markets have above average scores for choice of providers and actual switching rates. However the ability of consumers to understand and choose the most appropriate tariff has been a concern in the UK. The UK Competition and Markets Authority is currently investigating energy markets (electricity and gas, wholesale and retail; a final report should be available by mid-2016).
According to an EU-wide survey, both the UK's electricity and gas markets have very poor scores in terms of overall consumer satisfaction. In 2014, Ofgem introduced a number of measures to enhance price transparency for customers to address concerns regarding the ability of customers to understand and choose the most appropriate tariff. As a result, suppliers can offer no more than 4 tariffs for electricity and gas (8 in total) and must inform customers how much money they could save if they switched to the supplier's most advantageous tariff.
Electricity Market Reform in the UK
The UK has undertaken a reform of its electricity market, with the intention to deliver low carbon energy and reliable supplies, while minimising costs to consumers. The UK's Electricity Market Reform (EMR) has introduced two key mechanisms to provide incentives for the necessary investment required in energy infrastructure:
Contracts for Difference
(CFD) are aimed at providing long-term price stabilisation to low carbon plants, allowing investment to come forward at a lower cost of capital and therefore at a lower cost to consumers.
The
Capacity Market
is aimed at providing a regular retainer payment to reliable forms of capacity (both demand and supply side), in return for such capacity being available when the system is tight.
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