diff --git a/Disco.Services/Documents/AttachmentImport/Importer.cs b/Disco.Services/Documents/AttachmentImport/Importer.cs
index 1c48320e..ffc5da11 100644
--- a/Disco.Services/Documents/AttachmentImport/Importer.cs
+++ b/Disco.Services/Documents/AttachmentImport/Importer.cs
@@ -117,7 +117,7 @@ namespace Disco.Services.Documents.AttachmentImport
                                     msBuilder.Position = 0;
                                     using (var attachmentThumbnail = documentPageFirst.GetAttachmentThumbnail())
                                     {
-                                        documentPageFirst.Identifier.ImportPdfAttachment(Database, msBuilder, attachmentThumbnail);
+                                        documentPageFirst.Identifier.ImportPdfAttachment(Database, msBuilder, attachmentThumbnail, documentPages.Select(p => p.Identifier).ToList());
                                     }
                                 }
                             }
@@ -175,16 +175,21 @@ namespace Disco.Services.Documents.AttachmentImport
         {
             using (var pdfStream = File.OpenRead(PdfFilename))
             {
-                return ImportPdfAttachment(Identifier, Database, pdfStream, Thumbnail);
+                return ImportPdfAttachment(Identifier, Database, pdfStream, Thumbnail, new List<DocumentUniqueIdentifier>() { Identifier });
             }
         }
 
         public static bool ImportPdfAttachment(this DocumentUniqueIdentifier Identifier, DiscoDataContext Database, Stream PdfContent)
         {
-            return ImportPdfAttachment(Identifier, Database, PdfContent, null);
+            return ImportPdfAttachment(Identifier, Database, PdfContent, null, new List<DocumentUniqueIdentifier>() { Identifier });
         }
 
         public static bool ImportPdfAttachment(this DocumentUniqueIdentifier Identifier, DiscoDataContext Database, Stream PdfContent, Image Thumbnail)
+        {
+            return ImportPdfAttachment(Identifier, Database, PdfContent, Thumbnail, new List<DocumentUniqueIdentifier>() { Identifier });
+        }
+
+        public static bool ImportPdfAttachment(this DocumentUniqueIdentifier Identifier, DiscoDataContext Database, Stream PdfContent, Image Thumbnail, List<DocumentUniqueIdentifier> PageIdentifiers)
         {
             string filename;
             string comments;
@@ -230,7 +235,7 @@ namespace Disco.Services.Documents.AttachmentImport
             {
                 try
                 {
-                    var expressionResult = Identifier.DocumentTemplate.EvaluateOnAttachmentImportExpression(attachment, Database, creatorUser, Identifier.TimeStamp);
+                    var expressionResult = Identifier.DocumentTemplate.EvaluateOnAttachmentImportExpression(attachment, Database, creatorUser, Identifier.TimeStamp, PageIdentifiers);
                     DocumentsLog.LogImportAttachmentExpressionEvaluated(Identifier.DocumentTemplate, Identifier.Target, attachment, expressionResult);
                 }
                 catch (Exception ex)
diff --git a/Disco.Services/Documents/DocumentTemplateExpressionExtensions.cs b/Disco.Services/Documents/DocumentTemplateExpressionExtensions.cs
index 339949fb..3bf5c757 100644
--- a/Disco.Services/Documents/DocumentTemplateExpressionExtensions.cs
+++ b/Disco.Services/Documents/DocumentTemplateExpressionExtensions.cs
@@ -1,8 +1,11 @@
 using Disco.Data.Repository;
 using Disco.Models.Repository;
 using Disco.Models.Services.Documents;
+using Disco.Services.Documents;
 using Disco.Services.Expressions;
 using System;
+using System.Collections;
+using System.Collections.Generic;
 
 namespace Disco.Services
 {
@@ -57,12 +60,13 @@ namespace Disco.Services
             ExpressionCache.InvalidateKey("DocumentTemplate_OnImportExpression", dt.Id);
         }
 
-        public static string EvaluateOnAttachmentImportExpression(this DocumentTemplate dt, object Data, DiscoDataContext Database, User User, DateTime TimeStamp)
+        public static string EvaluateOnAttachmentImportExpression(this DocumentTemplate dt, object Data, DiscoDataContext Database, User User, DateTime TimeStamp, List<DocumentUniqueIdentifier> PageIdentifiers)
         {
             if (!string.IsNullOrEmpty(dt.OnImportAttachmentExpression))
             {
                 Expression compiledExpression = dt.OnImportAttachmentExpressionFromCache();
-                System.Collections.IDictionary evaluatorVariables = Expression.StandardVariables(dt, Database, User, TimeStamp, null);
+                IDictionary evaluatorVariables = Expression.StandardVariables(dt, Database, User, TimeStamp, null);
+                evaluatorVariables.Add("PageIdentifiers", PageIdentifiers);
                 try
                 {
                     object result = compiledExpression.EvaluateFirst<object>(Data, evaluatorVariables);
diff --git a/Disco.Services/Expressions/Expression.cs b/Disco.Services/Expressions/Expression.cs
index ba717258..e948735c 100644
--- a/Disco.Services/Expressions/Expression.cs
+++ b/Disco.Services/Expressions/Expression.cs
@@ -173,7 +173,7 @@ namespace Disco.Services.Expressions
             return e;
         }
 
-        public static IDictionary StandardVariables(DocumentTemplate AttachmentType, DiscoDataContext Database, User User, System.DateTime TimeStamp, DocumentState DocumentState)
+        public static IDictionary StandardVariables(DocumentTemplate AttachmentType, DiscoDataContext Database, User User, DateTime TimeStamp, DocumentState DocumentState)
         {
             return new Hashtable
 			{
@@ -221,7 +221,7 @@ namespace Disco.Services.Expressions
 
 				{
 					"#TimeStamp", 
-					typeof(System.DateTime).AssemblyQualifiedName
+					typeof(DateTime).AssemblyQualifiedName
 				}, 
 
 				{