diff --git a/instrument/LOQ_Definition_20160301.xml b/instrument/LOQ_Definition_20151016.xml
similarity index 99%
rename from instrument/LOQ_Definition_20160301.xml
rename to instrument/LOQ_Definition_20151016.xml
index 539c35523af8dd16fd134dbeaf945f8928c2557a..c9aa54a1288bd7969c5c02d5c334ed426abdd8a6 100644
--- a/instrument/LOQ_Definition_20160301.xml
+++ b/instrument/LOQ_Definition_20151016.xml
@@ -4,7 +4,7 @@
 <instrument xmlns="http://www.mantidproject.org/IDF/1.0" 
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://www.mantidproject.org/IDF/1.0 http://schema.mantidproject.org/IDF/1.0/IDFSchema.xsd"
- name="LOQ" valid-from   ="2015-10-16 11:40:00"
+ name="LOQ" valid-from   ="2015-10-16 00:00:00"
                        valid-to     ="2100-10-17 09:29:59"
 		       last-modified="2001-10-16 11:40:00">
 
diff --git a/instrument/LOQ_Parameters_M4.xml b/instrument/LOQ_Parameters_M4.xml
new file mode 100644
index 0000000000000000000000000000000000000000..bf2e1570034a43f8ba8fb0ce8fca1e2942cf2eea
--- /dev/null
+++ b/instrument/LOQ_Parameters_M4.xml
@@ -0,0 +1,66 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<parameter-file instrument = "LOQ" valid-from = "2015-10-16 00:00:00">
+
+<component-link name = "LOQ">
+
+<parameter name="low-angle-detector-name" type="string">
+  <value val="main-detector-bank"/>
+</parameter>
+
+<parameter name="low-angle-detector-short-name" type="string">
+  <value val="main"/>
+</parameter>
+<!-- this is the first spectrum number for an empty instrument (used for instrument view), runs generally have a different first number spectrum number-->
+<parameter name="first-low-angle-spec-number">
+  <value val="3"/>
+</parameter>
+<parameter name="low-angle-detector-num-columns">
+  <value val="128"/>
+</parameter>
+
+<parameter name="low-angle-detector-num-rows">
+  <value val="128"/>
+</parameter>
+
+<parameter name="high-angle-detector-name" type="string">
+  <value val="HAB"/>
+</parameter>
+
+<parameter name="high-angle-detector-short-name" type="string">
+  <value val="HAB"/>
+</parameter>
+
+<parameter name="centre-finder-step-size">
+<!-- this is the initial step for the beam centre finder in metres -->
+  <value val="0.001"/>
+</parameter>
+
+<!-- the following few lines respond to the hole in LOQs front detector -->
+<parameter name="high-angle-detector-non-rectangle-height">
+  <value val="128"/>
+</parameter>
+
+<parameter name="high-angle-detector-non-rectangle-width">
+  <value val="128"/>
+</parameter>
+<parameter name="high-angle-detector-num-pixels">
+  <value val="1406"/>
+</parameter>
+
+<parameter name="default-incident-monitor-spectrum">
+  <value val="2"/>
+</parameter>
+
+<!-- The M4 monitor is the default transmission monitor spectrum-->
+<parameter name="default-transmission-monitor-spectrum">
+  <value val="17788"/>
+</parameter>
+
+<parameter name="collimation-length-correction">
+  <!-- This is a correction length in meter for the L1 value to obtain the default collimation length-->
+  <value val="6.480"/>
+</parameter>
+
+</component-link>
+
+</parameter-file>
diff --git a/instrument/LOQ_trans_Definition_M4.xml b/instrument/LOQ_trans_Definition_M4.xml
index 5058df6a75903c8d6c87cd3093b550c254191c34..d83e24277e98bfb022d07272a2a7e649004da41b 100644
--- a/instrument/LOQ_trans_Definition_M4.xml
+++ b/instrument/LOQ_trans_Definition_M4.xml
@@ -4,7 +4,7 @@
 <instrument xmlns="http://www.mantidproject.org/IDF/1.0" 
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://www.mantidproject.org/IDF/1.0 http://schema.mantidproject.org/IDF/1.0/IDFSchema.xsd"
- name="LOQ" valid-from   ="1900-01-31 23:59:59"
+ name="LOQ" valid-from   ="2015-10-16 00:00:00"
                        valid-to     ="2100-01-31 23:59:59"
 		       last-modified="2009-03-10 00:00:00">