Two further interconnectors to Europe will be commissioned in 2019 , increasing UK interconnector capacity from 4GW to 6GW . A further five interconnector projects totalling 5.7GW are also in the development phase , which would double capacity again by 2023 if all reach financial close . The latest tranche is all backed by the cap and floor support mechanism crafted by Ofgem and the European Commission . Several industry voices are arguing that the UK is in danger of being over-interconnected as the incremental value of additional interconnectors is low , perhaps even negative , and is ultimately deterring adequate new build of generation plant in the UK . An acrimonious Brexit would almost certainly focus attention on these matters . www . ec . europa . eu

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