<?xml version="1.0" encoding="utf-8"?>
<xs:schema xmlns:dlgplc="http://dlgplc.com/xbrl/2021" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xbrli="http://www.xbrl.org/2003/instance" targetNamespace="http://dlgplc.com/xbrl/2021" xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:import schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" namespace="http://www.xbrl.org/2003/instance" />
  <xs:import schemaLocation="http://www.esma.europa.eu/taxonomy/2020-03-16/esef_cor.xsd" namespace="http://www.esma.europa.eu/taxonomy/2020-03-16/esef_cor" />
  <xs:import schemaLocation="http://www.xbrl.org/lrr/arcrole/esma-arcrole-2018-11-21.xsd" namespace="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" />
  <xs:import schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd" namespace="http://www.xbrl.org/dtr/type/non-numeric" />
  <xs:import schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" namespace="http://xbrl.org/2005/xbrldt" />
  <xs:annotation>
    <xs:appinfo>
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="dlgplc-2021-12-31_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="dlgplc-2021-12-31_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="dlgplc-2021-12-31_lab-en.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="dlgplc-2021-12-31_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="http://www.esma.europa.eu/taxonomy/2020-03-16/esef_cor-lab-en.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="http://www.esma.europa.eu/taxonomy/2020-03-16/esef_cor-gen-en.xml" xlink:type="simple" />
      <link:roleType id="Anchoring" roleURI="http://dlgplc.com/xbrl/2021/roles/Anchoring">
        <link:definition>99 - Groups all anchored elements</link:definition>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:labelLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NotesAndMandatoryItems" roleURI="http://dlgplc.com/xbrl/2021/roles/NotesAndMandatoryItems">
        <link:definition>01 - Notes And Mandatory Items</link:definition>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:labelLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ProfitOrLoss" roleURI="http://dlgplc.com/xbrl/2021/roles/ProfitOrLoss">
        <link:definition>02 - Profit or loss</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:labelLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StatementOfComprehensiveIncome" roleURI="http://dlgplc.com/xbrl/2021/roles/StatementOfComprehensiveIncome">
        <link:definition>03 - Statement of comprehensive income</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:labelLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StatementOfFinancialPosition" roleURI="http://dlgplc.com/xbrl/2021/roles/StatementOfFinancialPosition">
        <link:definition>04 - Statement of financial position</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:labelLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StatementOfChangesInEquity" roleURI="http://dlgplc.com/xbrl/2021/roles/StatementOfChangesInEquity">
        <link:definition>05 - Statement of changes in equity</link:definition>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:labelLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StatementOfCashFlows" roleURI="http://dlgplc.com/xbrl/2021/roles/StatementOfCashFlows">
        <link:definition>06 - Statement of cash flows</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:labelLink</link:usedOn>
      </link:roleType>
    </xs:appinfo>
  </xs:annotation>
  <xs:element id="dlgplc_GrossEarnedPremium" xbrli:balance="credit" xbrli:periodType="duration" name="GrossEarnedPremium" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" />
  <xs:element id="dlgplc_ReinsurancePremium" xbrli:balance="debit" xbrli:periodType="duration" name="ReinsurancePremium" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" />
  <xs:element id="dlgplc_InstalmentIncome" xbrli:balance="credit" xbrli:periodType="duration" name="InstalmentIncome" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" />
  <xs:element id="dlgplc_TotalIncome" xbrli:balance="credit" xbrli:periodType="duration" name="TotalIncome" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" />
  <xs:element id="dlgplc_InsuranceClaims" xbrli:balance="debit" xbrli:periodType="duration" name="InsuranceClaims" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" />
  <xs:element id="dlgplc_InsuranceClaimsRecoverableFromReinsurers" xbrli:balance="credit" xbrli:periodType="duration" name="InsuranceClaimsRecoverableFromReinsurers" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" />
  <xs:element id="dlgplc_InsuranceAndOtherReceivables" xbrli:balance="debit" xbrli:periodType="instant" name="InsuranceAndOtherReceivables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" />
  <xs:element id="dlgplc_PrepaymentsAccruedIncomeAndOtherAssets" xbrli:balance="debit" xbrli:periodType="instant" name="PrepaymentsAccruedIncomeAndOtherAssets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" />
  <xs:element id="dlgplc_ShareholdersEquity" xbrli:balance="credit" xbrli:periodType="instant" name="ShareholdersEquity" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" />
  <xs:element id="dlgplc_Tier1Notes" xbrli:balance="credit" xbrli:periodType="instant" name="Tier1Notes" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" />
  <xs:element id="dlgplc_AFSRevaluationReserveMember" xbrli:periodType="duration" abstract="true" name="AFSRevaluationReserveMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" />
  <xs:element id="dlgplc_Tier1NotesMember" xbrli:periodType="duration" abstract="true" name="Tier1NotesMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" />
  <xs:element id="dlgplc_SharesAcquiredByEmployeeTrusts" xbrli:balance="debit" xbrli:periodType="duration" name="SharesAcquiredByEmployeeTrusts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" />
  <xs:element id="dlgplc_SharesDistributedByEmployeeTrusts" xbrli:balance="credit" xbrli:periodType="duration" name="SharesDistributedByEmployeeTrusts" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" />
  <xs:element id="dlgplc_NetCashGeneratedFromOperatingActivitiesBeforeInvestmentOfInsuranceAssetsClassifiedAsOperatingActivities" xbrli:balance="debit" xbrli:periodType="duration" name="NetCashGeneratedFromOperatingActivitiesBeforeInvestmentOfInsuranceAssetsClassifiedAsOperatingActivities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" />
  <xs:element id="dlgplc_CashGeneratedFromInvestmentOfInsuranceAssets" xbrli:balance="debit" xbrli:periodType="duration" name="CashGeneratedFromInvestmentOfInsuranceAssets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" />
  <xs:element id="dlgplc_AppropriationsPaidClassifiedAsFinancingActivities" xbrli:balance="credit" xbrli:periodType="duration" name="AppropriationsPaidClassifiedAsFinancingActivities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" />
  <xs:element id="dlgplc_FinanceCostsIncludingLeaseInterestClassifiedAsFinancingActivities" xbrli:balance="credit" xbrli:periodType="duration" name="FinanceCostsIncludingLeaseInterestClassifiedAsFinancingActivities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" />
  <xs:element id="dlgplc_PurchaseOfEmployeeTrustSharesClassifiedAsFinancingActivities" xbrli:balance="credit" xbrli:periodType="duration" name="PurchaseOfEmployeeTrustSharesClassifiedAsFinancingActivities" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" />
</xs:schema>