List of high-voltage transmission links in the United Kingdom

The following is a list of high-voltage transmission links in the United Kingdom, including some under construction or proposed.

The rise of UK interconnection
During 2021 interconnectors provided 28TWh of electricity to the UK, which equates to 10% of total demand, whilst in 2009 this figure was 7TWh.

Interconnectors allow the trade of electricity between countries with excess renewable generation and those with high demand. Interconnectors play a key part in balancing variable renewable generation, for example the North Sea Link allows the UK to export excess power to Norway during windy periods to conserve Norwegian hydro stocks and import Norwegian hydro power on less windy days.

During 2022 the UK exported record amounts of power to mainland Europe, helping to alleviate the effects of the war in Ukraine on European security of supply.

International links
Per the below list the United Kingdom has an international interconnector capacity of 9,700 MW.

National links
Per the below list the United Kingdom has a national interconnector capacity of 1,700 MW.