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  <xs:element id="brns_ResearchGrantsAndContractsMember" abstract="true" name="ResearchGrantsAndContractsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="brns_ResearchAndDevelopmentIncentiveIncomeExpense" abstract="false" name="ResearchAndDevelopmentIncentiveIncomeExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="brns_ValuationAllowanceDeferredTaxAssetIncreaseDecreaseResultingFromForeignCurrencyTranslation" abstract="false" name="ValuationAllowanceDeferredTaxAssetIncreaseDecreaseResultingFromForeignCurrencyTranslation" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="brns_OtherInformationLesseeAbstract" abstract="true" name="OtherInformationLesseeAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="brns_AmericanDepositarySharesMember" abstract="true" name="AmericanDepositarySharesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="brns_ContingentConsiderationLiabilityMember" abstract="true" name="ContingentConsiderationLiabilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="brns_OxfordshireMember" abstract="true" name="OxfordshireMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="brns_BarinthusBiotherapeuticsPlcShareAwardPlan2021Member" abstract="true" name="BarinthusBiotherapeuticsPlcShareAwardPlan2021Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="brns_CommonStockNumberOfVotesPerShare" abstract="false" name="CommonStockNumberOfVotesPerShare" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="brns_AgreementWithOxfordUniversityInnovationMember" abstract="true" name="AgreementWithOxfordUniversityInnovationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="brns_ContractWithCustomerLiabilityRevenueRecognized1" abstract="false" name="ContractWithCustomerLiabilityRevenueRecognized1" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="brns_FundingAmountMaximum" abstract="false" name="FundingAmountMaximum" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="brns_EffectiveIncomeTaxRateReconciliationProvisionToReturnAdjustments" abstract="false" name="EffectiveIncomeTaxRateReconciliationProvisionToReturnAdjustments" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="brns_IncreaseDecreaseInResearchAndDevelopmentIncentivesReceivable" abstract="false" name="IncreaseDecreaseInResearchAndDevelopmentIncentivesReceivable" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="brns_EnterpriseManagementIncentiveShareOptionSchemeMember" abstract="true" name="EnterpriseManagementIncentiveShareOptionSchemeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="brns_SubsidiariesVOLTMember" abstract="true" name="SubsidiariesVOLTMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="brns_AgreementWithScancellToGrantResearchAndDevelopmentLicenseMember" abstract="true" name="AgreementWithScancellToGrantResearchAndDevelopmentLicenseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="brns_DeferredTaxAssetsLeasingArrangements" abstract="false" name="DeferredTaxAssetsLeasingArrangements" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="brns_GrantIncomePolicyPolicyTextBlock" abstract="false" name="GrantIncomePolicyPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="brns_AccruedManufacturingAndClinicalExpensesCurrent" abstract="false" name="AccruedManufacturingAndClinicalExpensesCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="brns_DeferredBSharesMember" abstract="true" name="DeferredBSharesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="brns_AccountsReceivableStandardPaymentTermsPeriod" abstract="false" name="AccountsReceivableStandardPaymentTermsPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="brns_NumberOfSquareFeetUnderLeaseAgreement" abstract="false" name="NumberOfSquareFeetUnderLeaseAgreement" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="brns_DeferredStockSharesIssued" abstract="false" name="DeferredStockSharesIssued" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="brns_AdditionalPaidInCapitalPolicyTextBlock" abstract="false" name="AdditionalPaidInCapitalPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="brns_PercentageOfRoyaltiesOnNetSales" abstract="false" name="PercentageOfRoyaltiesOnNetSales" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="brns_ContractWithCustomerLiabilityForeignExchangeTranslation" abstract="false" name="ContractWithCustomerLiabilityForeignExchangeTranslation" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="brns_SharesCancelledDuringPeriodSharesDeferredShares" abstract="false" name="SharesCancelledDuringPeriodSharesDeferredShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="brns_EffectiveIncomeTaxRateReconciliationPercentIncreaseDecreaseAbstract" abstract="true" name="EffectiveIncomeTaxRateReconciliationPercentIncreaseDecreaseAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="brns_DeferredStockParOrStatedValuePerShare" abstract="false" name="DeferredStockParOrStatedValuePerShare" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:perShareItemType"/>
  <xs:element id="brns_PercentageOfFutureRoyaltiesForDirectSalesOfCoveredProductLicenseAgreement" abstract="false" name="PercentageOfFutureRoyaltiesForDirectSalesOfCoveredProductLicenseAgreement" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="brns_ContractWithCustomerLiabilitiesTableTextBlock" abstract="false" name="ContractWithCustomerLiabilitiesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="brns_PeriodOfPreemptiveRightsToBeExercised" abstract="false" name="PeriodOfPreemptiveRightsToBeExercised" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="brns_InLicenseAgreementsMember" abstract="true" name="InLicenseAgreementsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="brns_SubsidiaryCumulativeContributionsParent" abstract="false" name="SubsidiaryCumulativeContributionsParent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="brns_MaximumAggregateNominalAmountOfSharesAuthorizedToBeAllottedFreeFromStatutoryPreEmptionRights" abstract="false" name="MaximumAggregateNominalAmountOfSharesAuthorizedToBeAllottedFreeFromStatutoryPreEmptionRights" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="brns_ExpirationOfShareBasedCompensationPlanFromDateOfInitialIssuance" abstract="false" name="ExpirationOfShareBasedCompensationPlanFromDateOfInitialIssuance" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="brns_ValuationAllowanceRollForward" abstract="true" name="ValuationAllowanceRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="brns_IssuanceOfCommonStockOfferingCosts" abstract="false" name="IssuanceOfCommonStockOfferingCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="brns_FiniteLivedIntangibleAssetExpectedAmortizationYearSeven" abstract="false" name="FiniteLivedIntangibleAssetExpectedAmortizationYearSeven" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="brns_IncomeTaxesLineItems" abstract="true" name="IncomeTaxesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="brns_AvideaMember" abstract="true" name="AvideaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="brns_DeferredSharesMember" abstract="true" name="DeferredSharesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="brns_AssetRetirementObligations" abstract="false" name="AssetRetirementObligations" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="brns_OxfordUniversityInnovationMember" abstract="true" name="OxfordUniversityInnovationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="brns_FiniteLivedIntangibleAssetExpectedAmortizationYearSix" abstract="false" name="FiniteLivedIntangibleAssetExpectedAmortizationYearSix" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="brns_AdjustmentsToAdditionalPaidInCapitalMeasurementPeriodAdjustmentsInBusinessCombination" abstract="false" name="AdjustmentsToAdditionalPaidInCapitalMeasurementPeriodAdjustmentsInBusinessCombination" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="brns_ResearchAndDevelopmentServicesPolicyPolicyTextBlock" abstract="false" name="ResearchAndDevelopmentServicesPolicyPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="brns_NonCashLeaseExpenses" abstract="false" name="NonCashLeaseExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="brns_SubsidiaryCumulativeContributionsNoncontrollingOwner" abstract="false" name="SubsidiaryCumulativeContributionsNoncontrollingOwner" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="brns_StockholdersEquityDeferredSharesDisclosureTextBlock" abstract="false" name="StockholdersEquityDeferredSharesDisclosureTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="brns_RoyaltyPaymentTermMaximum" abstract="false" name="RoyaltyPaymentTermMaximum" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="brns_FiniteLivedIntangibleAssetExpectedAmortizationYearEight" abstract="false" name="FiniteLivedIntangibleAssetExpectedAmortizationYearEight" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="brns_NonCashInterestExpenseOnConvertibleLoanNotes" abstract="false" name="NonCashInterestExpenseOnConvertibleLoanNotes" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="brns_ContingentConsiderationSettledInEquity" abstract="false" name="ContingentConsiderationSettledInEquity" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="brns_LaboratoryEquipmentMember" abstract="true" name="LaboratoryEquipmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="brns_ContractWithCustomerLiabilityRollForward" abstract="true" name="ContractWithCustomerLiabilityRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="brns_DeferredStockSharesOutstanding" abstract="false" name="DeferredStockSharesOutstanding" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="brns_LeaseIncentiveReceivablesCurrent" abstract="false" name="LeaseIncentiveReceivablesCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="brns_ResearchAndDevelopmentIncentivesPolicyTextBlock" abstract="false" name="ResearchAndDevelopmentIncentivesPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="brns_DeferredShares.Member" abstract="true" name="DeferredShares.Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="brns_OxfordUniversityInnovationLimitedMember" abstract="true" name="OxfordUniversityInnovationLimitedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="brns_AuditInformationAbstract" abstract="true" name="AuditInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="brns_ShareholderTheUniversityOfOxfordMember" abstract="true" name="ShareholderTheUniversityOfOxfordMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="brns_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityForeignExchangeTranslation" abstract="false" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityForeignExchangeTranslation" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="brns_DeferredStockValueIssued" abstract="false" name="DeferredStockValueIssued" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
