The data supporting the table below and the % values are sourced from a mixture of industry settlement data and the UK government renewable obligation database.
| LOW-CARBON GENERATION SUMMARY BY COMPANY | 2018 | 2018 | |
| Supplier name | Low-carbon | GWh of low-carbon electricity generation | % of overall low-carbon electricity generation |
| EDF ENERGY | Low-carbon | 45,517 | 35% |
| CENTRICA | Low-carbon | 11,820 | 9% |
| RWE | Low-carbon | 2,928 | 2% |
| E.on | Low-carbon | 2,818 | 2% |
| SSE | Low-carbon | 6,131 | 5% |
| SCOTTISH POWER | Low-carbon | 2,855 | 2% |
| DRAX | Low-carbon | 7,818 | 6% |
| ENGIE | Low-carbon | 166 | 0% |
| OTHER | Low-carbon | 52,727 | 39% |
| TOTAL | Low-carbon | 134,780 | 100% |
Using the latest available data would put EDF Energy's % of low carbon generation at 35%, with Other at 39%. The 39% of Other can itself be broken down into many different owners, the top ten by share of the Other owners and their percentage share of that 39% is below:
| DONG Energy RB (UK) Ltd | 5.90% |
| Vattenfall Wind Power Ltd | 3.36% |
| Morecambe Wind Limited | 2.91% |
| Fred Olsen Renewables Ltd | 2.59% |
| Walney (UK) Offshore Windfarms Ltd | 2.59% |
| Clyde Windfarm (Scotland) Limited | 2.44% |
| Galloper Wind Farm Limited | 2.42% |
| Octopus Investments Limited | 2.37% |
| Foresight Group LLP | 1.97% |
| Falck Renewables Ltd | 1.86% |
DONG Energy alone accounted for 2.3% of all low-carbon generation in 2018 (38% x 5.9%), with Vattenfall a further 1.3%, and Fred Olsen 1.0%. Removing DONG, Vattenfall and Fred Olsen would leave Other at 34.4%, which itself is still made up of many smaller, independent generators with split ownership. It is, therefore, the case that EDF was the single largest generator of low-carbon electricity in 2018.
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