diff --git a/app/services/supplementary-billing/generate-billing-invoice-licence.service.js b/app/services/supplementary-billing/generate-billing-invoice-licence.service.js
new file mode 100644
index 0000000000..f4476fe8ee
--- /dev/null
+++ b/app/services/supplementary-billing/generate-billing-invoice-licence.service.js
@@ -0,0 +1,50 @@
+'use strict'
+
+/**
+ * Generates a billing invoice licence record ready for persisting
+ * @module CreateBillingInvoiceLicenceService
+ */
+
+const { randomUUID } = require('crypto')
+
+/**
+ * Create a billing invoice licence record for the provided billing invoice and licence
+ *
+ * @param {module:BillingInvoiceModel} billingInvoice An instance of `BillingInvoiceModel`
+ * @param {module:licenceModel} licence An instance of `LicenceModel`
+ *
+ * @returns {Object} The newly-created billing invoice licence record
+ */
+async function go (generatedBillingInvoiceLicences, billingInvoiceId, licence) {
+  let billingInvoiceLicence = _existing(generatedBillingInvoiceLicences, billingInvoiceId)
+
+  if (billingInvoiceLicence) {
+    return {
+      billingInvoiceLicence,
+      billingInvoiceLicences: generatedBillingInvoiceLicences
+    }
+  }
+
+  billingInvoiceLicence = {
+    billingInvoiceId,
+    billingInvoiceLicenceId: randomUUID({ disableEntropyCache: true }),
+    licenceRef: licence.licenceRef,
+    licenceId: licence.licenceId
+  }
+  const updatedBillingInvoiceLicences = [...generatedBillingInvoiceLicences, billingInvoiceLicence]
+
+  return {
+    billingInvoiceLicence,
+    billingInvoiceLicences: updatedBillingInvoiceLicences
+  }
+}
+
+function _existing (generatedBillingInvoiceLicences, billingInvoiceId) {
+  return generatedBillingInvoiceLicences.filter((invoiceLicence) => {
+    return billingInvoiceId === invoiceLicence.billingInvoiceId
+  })[0]
+}
+
+module.exports = {
+  go
+}
diff --git a/app/services/supplementary-billing/generate-billing-invoice.service.js b/app/services/supplementary-billing/generate-billing-invoice.service.js
index c8626b5fc7..25a0cab7f3 100644
--- a/app/services/supplementary-billing/generate-billing-invoice.service.js
+++ b/app/services/supplementary-billing/generate-billing-invoice.service.js
@@ -10,11 +10,14 @@ const { randomUUID } = require('crypto')
 
 const InvoiceAccountModel = require('../../models/crm-v2/invoice-account.model.js')
 
-async function go (invoiceAccountId, billingBatchId, financialYearEnding, generatedBillingInvoices = []) {
-  let billingInvoice = _existingBillingInvoice(invoiceAccountId, generatedBillingInvoices)
+async function go (generatedBillingInvoices, invoiceAccountId, billingBatchId, financialYearEnding) {
+  let billingInvoice = _existing(generatedBillingInvoices, invoiceAccountId)
 
   if (billingInvoice) {
-    return billingInvoice
+    return {
+      billingInvoice,
+      billingInvoices: generatedBillingInvoices
+    }
   }
 
   const invoiceAccount = await InvoiceAccountModel.query().findById(invoiceAccountId)
@@ -28,15 +31,18 @@ async function go (invoiceAccountId, billingBatchId, financialYearEnding, genera
     financialYearEnding,
     isCredit: false
   }
-  generatedBillingInvoices.push(billingInvoice)
+  const updatedBillingInvoices = [...generatedBillingInvoices, billingInvoice]
 
-  return billingInvoice
+  return {
+    billingInvoice,
+    billingInvoices: updatedBillingInvoices
+  }
 }
 
-function _existingBillingInvoice (invoiceAccountId, generatedBillingInvoices) {
+function _existing (generatedBillingInvoices, invoiceAccountId) {
   return generatedBillingInvoices.filter((invoice) => {
     return invoiceAccountId === invoice.invoiceAccountId
-  })
+  })[0]
 }
 
 module.exports = {
diff --git a/app/services/supplementary-billing/process-billing-batch.service.js b/app/services/supplementary-billing/process-billing-batch.service.js
index 27959d7eb3..8b51869277 100644
--- a/app/services/supplementary-billing/process-billing-batch.service.js
+++ b/app/services/supplementary-billing/process-billing-batch.service.js
@@ -39,16 +39,18 @@ async function go (billingBatch, billingPeriod) {
   // This is why we are only passing through the first billing period; we know there is only one!
   const chargeVersions = await FetchChargeVersionsService.go(billingBatch.regionId, billingPeriod)
 
-  const generatedBillingInvoices = []
+  let generatedBillingInvoices = []
   for (const chargeVersion of chargeVersions) {
-    const { chargeElements, licence } = chargeVersion
+    // const { chargeElements, licence } = chargeVersion
 
-    const billingInvoice = await GenerateBillingInvoiceService.go(
+    const result = await GenerateBillingInvoiceService.go(
+      generatedBillingInvoices,
       chargeVersion.invoiceAccountId,
       billingBatchId,
-      financialYearEnding,
-      generatedBillingInvoices
+      financialYearEnding
     )
+    generatedBillingInvoices = result.billingInvoices
+
     const billingInvoiceLicence = {
       billingInvoiceLicenceId: randomUUID({ disableEntropyCache: true }),
       billingInvoiceId: billingInvoice.billingInvoiceId,
@@ -56,22 +58,25 @@ async function go (billingBatch, billingPeriod) {
       licenceId: licence.licenceId
     }
 
+    let transactionLines = []
     if (chargeVersion.chargeElements) {
-      const transactionLines = _generateTransactionLines(billingPeriod, chargeVersion)
+      transactionLines = _generateTransactionLines(billingPeriod, chargeVersion)
 
       if (transactionLines.length > 0) {
         await _createTransactionLines(
           transactionLines,
           billingPeriod,
-          billingInvoice.invoiceAccountNumber,
+          result.billingInvoice.invoiceAccountNumber,
           billingInvoiceLicence.billingInvoiceLicenceId,
           chargeVersion,
           billingBatch.externalId
         )
       }
     }
+    billingInvoiceLicence.transactionLines = transactionLines
   }
 
+
   await ChargingModuleGenerateService.go(billingBatch.externalId)
 
   // NOTE: Retaining this as a candidate for updating the bill run status if the process errors or the bill run is empty