{
  "report-package": "8R95QZMKZLJX5Q2XR704-2022-03-31.zip",
  "date": "2022-03-31",
  "lei": "8R95QZMKZLJX5Q2XR704",
  "system": "ESEF",
  "country": "GB",
  "langs": [
    "en"
  ],
  "report": "8R95QZMKZLJX5Q2XR704-2022-03-31/reports/8R95QZMKZLJX5Q2XR704-2022-03-31-T01.xhtml",
  "viewer": "8R95QZMKZLJX5Q2XR704-2022-03-31/reports/ixbrlviewer.html",
  "xbrl-json": "8R95QZMKZLJX5Q2XR704-2022-03-31-T01.json",
  "sha256sum": "47f8e12055a1c317652524f2940ee6f1afa57789f0d1d6daa57576dca3360e35",
  "errors": [
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from ifrs-full:ComprehensiveIncome in link role http://nationalgridplc.com/xbrl/2021/roles/ProfitOrLoss reported sum 2,000,000 computed sum 1,000,000 context c-23 unit u-1 unreportedContributingItems ifrs-full:ProfitLossFromContinuingOperations, ifrs-full:ProfitLossFromDiscontinuedOperations"
    },
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from ifrs-full:ComprehensiveIncome in link role http://nationalgridplc.com/xbrl/2021/roles/ProfitOrLoss reported sum 4,224,000,000 computed sum 1,871,000,000 context c-46 unit u-1 unreportedContributingItems ifrs-full:ProfitLossFromContinuingOperations, ifrs-full:ProfitLossFromDiscontinuedOperations"
    },
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from ifrs-full:ComprehensiveIncome in link role http://nationalgridplc.com/xbrl/2021/roles/ProfitOrLoss reported sum 755,000,000 computed sum -509,000,000 context c-20 unit u-1 unreportedContributingItems ifrs-full:ProfitLossFromContinuingOperations, ifrs-full:ProfitLossFromDiscontinuedOperations"
    },
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from ifrs-full:ComprehensiveIncome in link role http://nationalgridplc.com/xbrl/2021/roles/ProfitOrLoss reported sum 4,829,000,000 computed sum 2,476,000,000 context c-48 unit u-1 unreportedContributingItems ifrs-full:ProfitLossFromContinuingOperations, ifrs-full:ProfitLossFromDiscontinuedOperations"
    },
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from ifrs-full:ComprehensiveIncome in link role http://nationalgridplc.com/xbrl/2021/roles/ProfitOrLoss reported sum -1,000,000 computed sum -2,000,000 context c-36 unit u-1 unreportedContributingItems ifrs-full:ProfitLossFromContinuingOperations, ifrs-full:ProfitLossFromDiscontinuedOperations"
    },
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from ifrs-full:ComprehensiveIncome in link role http://nationalgridplc.com/xbrl/2021/roles/ProfitOrLoss reported sum 2,000,000 computed sum 1,000,000 context c-49 unit u-1 unreportedContributingItems ifrs-full:ProfitLossFromContinuingOperations, ifrs-full:ProfitLossFromDiscontinuedOperations"
    },
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from ifrs-full:ComprehensiveIncome in link role http://nationalgridplc.com/xbrl/2021/roles/ProfitOrLoss reported sum 2,641,000,000 computed sum 1,001,000,000 context c-33 unit u-1 unreportedContributingItems ifrs-full:ProfitLossFromContinuingOperations, ifrs-full:ProfitLossFromDiscontinuedOperations"
    },
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from ifrs-full:ComprehensiveIncome in link role http://nationalgridplc.com/xbrl/2021/roles/ProfitOrLoss reported sum 1,098,000,000 computed sum -166,000,000 context c-22 unit u-1 unreportedContributingItems ifrs-full:ProfitLossFromContinuingOperations, ifrs-full:ProfitLossFromDiscontinuedOperations"
    },
    {
      "sev": "INCONSISTENCY",
      "code": "xbrl.5.2.5.2:calcInconsistency",
      "msg": "Calculation inconsistent from ifrs-full:ComprehensiveIncome in link role http://nationalgridplc.com/xbrl/2021/roles/ProfitOrLoss reported sum 1,459,000,000 computed sum -181,000,000 context c-35 unit u-1 unreportedContributingItems ifrs-full:ProfitLossFromContinuingOperations, ifrs-full:ProfitLossFromDiscontinuedOperations"
    },
    {
      "sev": "WARNING",
      "code": "message:positive",
      "msg": "Reported value is below 0"
    },
    {
      "sev": "WARNING",
      "code": "message:positive",
      "msg": "Reported value is below 0"
    },
    {
      "sev": "WARNING",
      "code": "message:positive",
      "msg": "Reported value is below 0"
    },
    {
      "sev": "WARNING",
      "code": "message:positive",
      "msg": "Reported value is below 0"
    },
    {
      "sev": "WARNING",
      "code": "message:positive",
      "msg": "Reported value is below 0"
    },
    {
      "sev": "WARNING",
      "code": "message:positive",
      "msg": "Reported value is below 0"
    },
    {
      "sev": "WARNING",
      "code": "message:man_ExplanationOfChangeInNameOfReportingEntityOrOtherMeansOfIdentificationFromEndOfPrecedingReportingPeriod",
      "msg": "missingMandatoryMarkups: According to the Regulatory Technical Standards on European Single Electronic Format, the element \"Explanation of change in name of reporting entity or other means of identification from end of preceding reporting period\" is part of the mandatory list of tags that must be applied if corresponding information is present in a report. Please make sure that you applied this tag in your report."
    },
    {
      "sev": "WARNING",
      "code": "message:man_PrincipalPlaceOfBusiness",
      "msg": "missingMandatoryMarkups: According to the Regulatory Technical Standards on European Single Electronic Format, the element \"Principal place of business\" is part of the mandatory list of tags that must be applied if corresponding information is present in a report. Please make sure that you applied this tag in your report."
    },
    {
      "sev": "WARNING",
      "code": "message:man_NameOfParentEntity",
      "msg": "missingMandatoryMarkups: According to the Regulatory Technical Standards on European Single Electronic Format, the element \"Name of parent entity\" is part of the mandatory list of tags that must be applied if corresponding information is present in a report. Please make sure that you applied this tag in your report."
    }
  ],
  "added": "2022-07-19"
}