In our monitoring of the wholesale energy market for gas and electricity, we collect and analyse a large range of data. Our wholesale indicators give a snapshot of this monitoring. They are derived from our monitoring framework which underpins our ongoing monitoring and annual assessment of the wholesale energy market in Great Britain. You can view the assessments in the related publications section below.
Our interactive wholesale market indicators
Select from the below to view the indicators in detail and for an overview of our monitoring themes.
If you have feedback on the indicators, please contact us.
- Following a decrease in 2017, wholesale energy prices increased and were more volatile during Q1 2018. However, during Q2 and Q3 of 2018 the volatility reduced significantly as prices stabilised. Volatility did increase slightly in Q4 2018. See Wholesale Price Trends and Investment and Sustainability.
- GB continues to receive its gas supplies from a diverse range of sources, including GB North Sea fields, Norway, LNG, interconnector flows and storage. Whilst the majority of gas continued to come from Norway and the UK continental shelf, we saw a significant increase in LNG deliveries to GB terminals throughout Q4 2018. See Security of Supply.
- Coal’s share of the electricity generation mix in Q4 2018 remains very low by historical standards. There was an increase of both gas’ and renewables’ share. Gas’ share increased to 32.80% in Q4 2018 (higher than Q3 and Q2, but lower than Q1 2018), while renewables contributed over 31% of the mix. See Security of supply.
- There was lower liquidity in both gas and electricity trading in Q4 2018 compared with the previous quarter. A lower churn is seen for both electricity and gas in Q4 compared to Q3 and Q2 of 2018, but it was higher than Q1 2018. Electricity liquidity (measured by churn remains significantly below the level for gas). See Access and liquidity.
The wholesale price of gas and electricity are key market outcomes that have a significant impact on retail bills. Understanding how and why wholesale prices have changed help us understand why retail bills have changed.
Ensuring there is sufficient gas or electricity to meet demand is a key outcome of the energy market. It provides consumers with certainty they can get heat and power when they require it, and helps drive economic activity.
Highly liquid markets imply developed markets where it is easy to buy and sell energy at reliable prices. Liquid markets should have sufficient numbers of participants willing to buy and sell so that prices are not easily moved by a few small trades.
The amount of competition in the energy market can have a strong impact on final wholesale prices. The more pressures there are from companies competing with one another, the more likely the wholesale market will reflect the true economic costs to supply energy.
A more sustainable energy market has significant impacts on levels of pollution and greenhouse gas emissions. Investment is also essential to ensure that the market can meet the demands of current and future consumers.
We have selected this range of indicators to support general understanding of market outcomes, to provide a picture of the market where it is not produced elsewhere, or where there is scope for us to set a clear methodology for the data.
Our data comes from sources that are either publicly available, provided by third parties or from Ofgem information requests. Specific sources and relevant dates are listed with each indicator. We are grateful to third parties for allowing us to reproduce their data.
We will review the indicators periodically to ensure they continue to help promote transparency and understanding of the wholesale energy market.
These market indicators and data are not intended for use or to be relied on for any commercial purposes. View copyright and disclaimer