PM0122 - Implementation 6 April 2022 - All Day Codes / System Operator Transmission Owner Code Add to Calendar private 2022-04-06 09:00:00 2022-04-06 17:00:00 Europe/London PM0122 - Implementation National Energy System Operator noreply@nationalgrideso.com iCalendarGoogle CalendarOutlookOutlook OnlineYahoo! Calendar