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member, the agreement expired in January 2019. On 13 December 2022 TEIAS signed a new Observer Membership Agreement that will run for a period of three years.

On 12 February 2021, three Great Britain based operators left due to Brexit, with only Northern Ireland's SONI from the UK remaining.

On 26 April 2022 Ukrenergo signed an observer membership agreement and became the 40th member of ENTSO-E on 1 January 2024.

Since January 2024, ENTSO-E contains 40

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