diff --git a/Code/Mantid/instrument/REF_L_Parameters.xml b/Code/Mantid/instrument/REF_L_Parameters.xml
index 5330d332c4f81a91dd8e8d8ce9444fbc1818f2cc..3cf57dceaa4527d091fd18e99b4836aa9354c073 100644
--- a/Code/Mantid/instrument/REF_L_Parameters.xml
+++ b/Code/Mantid/instrument/REF_L_Parameters.xml
@@ -1,17 +1,17 @@
 <?xml version="1.0" encoding="UTF-8" ?>
-<parameter-file instrument = "REF" valid-from="2011-12-08 11:36:21.935542" valid-to="2100-01-31 23:59:59">
+<parameter-file instrument = "REF_L" valid-from="2011-12-08 11:36:21.935542" valid-to="2014-10-10 00:00:01">
 
-	<component-link name = "REF">
-	
-		<parameter name="number-of-x-pixels">
-		  <value val="304"/>
-		</parameter>
-		
-		<parameter name="number-of-y-pixels">
-		  <value val="256"/>
-		</parameter>
-	
-	</component-link>
+  <component-link name = "REF_L">
+
+    <parameter name="number-of-x-pixels">
+      <value val="304"/>
+    </parameter>
+
+    <parameter name="number-of-y-pixels">
+      <value val="256"/>
+    </parameter>
+
+</component-link>
 
 </parameter-file>
 
diff --git a/Code/Mantid/instrument/REF_L_Parameters_after_10102014.xml b/Code/Mantid/instrument/REF_L_Parameters_after_10102014.xml
new file mode 100644
index 0000000000000000000000000000000000000000..b6884401adb429e9e610a3208462b54f5aa09336
--- /dev/null
+++ b/Code/Mantid/instrument/REF_L_Parameters_after_10102014.xml
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<parameter-file instrument = "REF_L" valid-from="2014-10-10 00:00:02" valid-to="2100-01-31 23:59:59">
+
+  <component-link name = "REF_L">
+
+    <parameter name="number-of-x-pixels">
+      <value val="256"/>
+    </parameter>
+
+    <parameter name="number-of-y-pixels">
+      <value val="304"/>
+    </parameter>
+
+  </component-link>
+
+</parameter-file>
+