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<!--Created by Prophix, Powered by IRIS Carbon, Unique Code 67e19a4ee304a7174005f999, Generated At Mon, 24 Mar 2025 17:45:50 GMT-->
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  <link:labelLink xlink:type="extended" xlink:role="http://www.xbrl.org/2003/role/link">
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_RevenueFromSaleOfNaturalGas" xlink:label="RevenueFromSaleOfNaturalGas" xlink:title="RevenueFromSaleOfNaturalGas" />
    <link:label xlink:type="resource" xlink:label="label_RevenueFromSaleOfNaturalGas" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:title="label_RevenueFromSaleOfNaturalGas" xml:lang="en" id="label_RevenueFromSaleOfNaturalGas">Sales of gas related to balancing operations and operational needs</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="RevenueFromSaleOfNaturalGas" xlink:to="label_RevenueFromSaleOfNaturalGas" xlink:title="Label : RevenueFromSaleOfNaturalGas to label_RevenueFromSaleOfNaturalGas" />
    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_RepaymentsOfBorrowingsClassifiedAsFinancingActivities" xlink:label="RepaymentsOfBorrowingsClassifiedAsFinancingActivities" xlink:title="RepaymentsOfBorrowingsClassifiedAsFinancingActivities" />
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    <link:loc xlink:type="locator" xlink:href="https://xbrl.ifrs.org/taxonomy/2022-03-24/full_ifrs/full_ifrs-cor_2022-03-24.xsd#ifrs-full_CostOfPurchasedEnergySold" xlink:label="CostOfPurchasedEnergySold" xlink:title="CostOfPurchasedEnergySold" />
    <link:label xlink:type="resource" xlink:label="label_CostOfPurchasedEnergySold" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:title="label_CostOfPurchasedEnergySold" xml:lang="en" id="label_CostOfPurchasedEnergySold">Purchase of gas related to balancing of operations and operational needs</link:label>
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    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_NonCurrentRegulatoryLiabilities" xlink:label="NonCurrentRegulatoryLiabilities" xlink:title="NonCurrentRegulatoryLiabilities" />
    <link:label xlink:type="resource" xlink:label="label_NonCurrentRegulatoryLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_NonCurrentRegulatoryLiabilities" xml:lang="en" id="label_NonCurrentRegulatoryLiabilities">Non-Current Regulatory Liabilities</link:label>
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    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_CurrentRegulatoryLiabilities" xlink:label="CurrentRegulatoryLiabilities" xlink:title="CurrentRegulatoryLiabilities" />
    <link:label xlink:type="resource" xlink:label="label_CurrentRegulatoryLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_CurrentRegulatoryLiabilities" xml:lang="en" id="label_CurrentRegulatoryLiabilities">Current Regulatory Liabilities</link:label>
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    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_NetProvisions" xlink:label="NetProvisions" xlink:title="NetProvisions" />
    <link:label xlink:type="resource" xlink:label="label_NetProvisions" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_NetProvisions" xml:lang="en" id="label_NetProvisions">Net Provisions</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NetProvisions" xlink:to="label_NetProvisions" xlink:title="Label : NetProvisions to label_NetProvisions" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_AdjustmentsForDecreaseIncreaseInTaxReceivables" xlink:label="AdjustmentsForDecreaseIncreaseInTaxReceivables" xlink:title="AdjustmentsForDecreaseIncreaseInTaxReceivables" />
    <link:label xlink:type="resource" xlink:label="label_AdjustmentsForDecreaseIncreaseInTaxReceivables" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_AdjustmentsForDecreaseIncreaseInTaxReceivables" xml:lang="en" id="label_AdjustmentsForDecreaseIncreaseInTaxReceivables">Adjustments for Decrease (Increase) in Tax Receivables</link:label>
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    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_AdjustmentsForIncreaseDecreaseInTaxPayables" xlink:label="AdjustmentsForIncreaseDecreaseInTaxPayables" xlink:title="AdjustmentsForIncreaseDecreaseInTaxPayables" />
    <link:label xlink:type="resource" xlink:label="label_AdjustmentsForIncreaseDecreaseInTaxPayables" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_AdjustmentsForIncreaseDecreaseInTaxPayables" xml:lang="en" id="label_AdjustmentsForIncreaseDecreaseInTaxPayables">Adjustments for (Increase) / Decrease in Tax Payables</link:label>
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    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_CashFlowsFromUsedInOtherOperatingActivities" xlink:label="CashFlowsFromUsedInOtherOperatingActivities" xlink:title="CashFlowsFromUsedInOtherOperatingActivities" />
    <link:label xlink:type="resource" xlink:label="label_CashFlowsFromUsedInOtherOperatingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_CashFlowsFromUsedInOtherOperatingActivities" xml:lang="en" id="label_CashFlowsFromUsedInOtherOperatingActivities">Cash Flows from Used in Other Operating Activities</link:label>
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    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_ProceedsFromCashFlowsFromFinancingActivities" xlink:label="ProceedsFromCashFlowsFromFinancingActivities" xlink:title="ProceedsFromCashFlowsFromFinancingActivities" />
    <link:label xlink:type="resource" xlink:label="label_ProceedsFromCashFlowsFromFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_ProceedsFromCashFlowsFromFinancingActivities" xml:lang="en" id="label_ProceedsFromCashFlowsFromFinancingActivities">Proceeds from Cash Flows from Financing Activities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ProceedsFromCashFlowsFromFinancingActivities" xlink:to="label_ProceedsFromCashFlowsFromFinancingActivities" xlink:title="Label : ProceedsFromCashFlowsFromFinancingActivities to label_ProceedsFromCashFlowsFromFinancingActivities" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_ProceedsFromFinanceLeasesClassifiedAsFinancingActivities" xlink:label="ProceedsFromFinanceLeasesClassifiedAsFinancingActivities" xlink:title="ProceedsFromFinanceLeasesClassifiedAsFinancingActivities" />
    <link:label xlink:type="resource" xlink:label="label_ProceedsFromFinanceLeasesClassifiedAsFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_ProceedsFromFinanceLeasesClassifiedAsFinancingActivities" xml:lang="en" id="label_ProceedsFromFinanceLeasesClassifiedAsFinancingActivities">Proceeds from Finance Leases, Classified as Financing Activities</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ProceedsFromFinanceLeasesClassifiedAsFinancingActivities" xlink:to="label_ProceedsFromFinanceLeasesClassifiedAsFinancingActivities" xlink:title="Label : ProceedsFromFinanceLeasesClassifiedAsFinancingActivities to label_ProceedsFromFinanceLeasesClassifiedAsFinancingActivities" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_RepaymentsRelatingToCashFlowsFromFinancingActivities" xlink:label="RepaymentsRelatingToCashFlowsFromFinancingActivities" xlink:title="RepaymentsRelatingToCashFlowsFromFinancingActivities" />
    <link:label xlink:type="resource" xlink:label="label_RepaymentsRelatingToCashFlowsFromFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_RepaymentsRelatingToCashFlowsFromFinancingActivities" xml:lang="en" id="label_RepaymentsRelatingToCashFlowsFromFinancingActivities">Repayments relating to Cash Flows from Financing Activities</link:label>
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    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_InterestsClassifiedAsFinancingActivities" xlink:label="InterestsClassifiedAsFinancingActivities" xlink:title="InterestsClassifiedAsFinancingActivities" />
    <link:label xlink:type="resource" xlink:label="label_InterestsClassifiedAsFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_InterestsClassifiedAsFinancingActivities" xml:lang="en" id="label_InterestsClassifiedAsFinancingActivities">Interests Classified as Financing Activities</link:label>
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    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_InterestsReceivedClassifiedAsFinancingActivities" xlink:label="InterestsReceivedClassifiedAsFinancingActivities" xlink:title="InterestsReceivedClassifiedAsFinancingActivities" />
    <link:label xlink:type="resource" xlink:label="label_InterestsReceivedClassifiedAsFinancingActivities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_InterestsReceivedClassifiedAsFinancingActivities" xml:lang="en" id="label_InterestsReceivedClassifiedAsFinancingActivities">Interests Received Classified as Financing Activities</link:label>
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    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_OperatingRevenue" xlink:label="OperatingRevenue" xlink:title="OperatingRevenue" />
    <link:label xlink:type="resource" xlink:label="label_OperatingRevenue" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_OperatingRevenue" xml:lang="en" id="label_OperatingRevenue">Operating Revenue</link:label>
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    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_ShareCapitalAndSharePremiums" xlink:label="ShareCapitalAndSharePremiums" xlink:title="ShareCapitalAndSharePremiums" />
    <link:label xlink:type="resource" xlink:label="label_ShareCapitalAndSharePremiums" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_ShareCapitalAndSharePremiums" xml:lang="en" id="label_ShareCapitalAndSharePremiums">Share Capital and Share Premiums</link:label>
    <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ShareCapitalAndSharePremiums" xlink:to="label_ShareCapitalAndSharePremiums" xlink:title="Label : ShareCapitalAndSharePremiums to label_ShareCapitalAndSharePremiums" />
    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_RetainedEarningsAndOtherReserves" xlink:label="RetainedEarningsAndOtherReserves" xlink:title="RetainedEarningsAndOtherReserves" />
    <link:label xlink:type="resource" xlink:label="label_RetainedEarningsAndOtherReserves" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_RetainedEarningsAndOtherReserves" xml:lang="en" id="label_RetainedEarningsAndOtherReserves">Retained Earnings and Other Reserves</link:label>
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    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_AdjustmentsForDecreaseIncreaseInRegulatoryDeferralAccounts" xlink:label="AdjustmentsForDecreaseIncreaseInRegulatoryDeferralAccounts" xlink:title="AdjustmentsForDecreaseIncreaseInRegulatoryDeferralAccounts" />
    <link:label xlink:type="resource" xlink:label="label_AdjustmentsForDecreaseIncreaseInRegulatoryDeferralAccounts" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_AdjustmentsForDecreaseIncreaseInRegulatoryDeferralAccounts" xml:lang="en" id="label_AdjustmentsForDecreaseIncreaseInRegulatoryDeferralAccounts">Adjustments for Decrease (Increase) in Regulatory Deferral Accounts</link:label>
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    <link:loc xlink:type="locator" xlink:href="52990071WX2UW1WNHC16-2024-12-31.xsd#flux1_RepaymentOfOtherFinancialLiabilities" xlink:label="RepaymentOfOtherFinancialLiabilities" xlink:title="RepaymentOfOtherFinancialLiabilities" />
    <link:label xlink:type="resource" xlink:label="label_RepaymentOfOtherFinancialLiabilities" xlink:role="http://www.xbrl.org/2003/role/label" xlink:title="label_RepaymentOfOtherFinancialLiabilities" xml:lang="en" id="label_RepaymentOfOtherFinancialLiabilities">Repayment of Other Financial Liabilities</link:label>
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