diff --git a/scripts/Interface/ui/sans_isis/sans_data_processor_gui.py b/scripts/Interface/ui/sans_isis/sans_data_processor_gui.py
index 02991dd007279110f16a5084361f889a4bf11ff5..deac02821a39202dc57c77da07826460d2f45afe 100644
--- a/scripts/Interface/ui/sans_isis/sans_data_processor_gui.py
+++ b/scripts/Interface/ui/sans_isis/sans_data_processor_gui.py
@@ -155,6 +155,10 @@ class SANSDataProcessorGui(QMainWindow, ui_sans_data_processor_window.Ui_SansDat
         def on_cut_rows(self):
             pass
 
+        @abstractmethod
+        def on_compatibility_unchecked(self):
+            pass
+
     def __init__(self):
         """
         Initialise the interface
@@ -198,6 +202,8 @@ class SANSDataProcessorGui(QMainWindow, ui_sans_data_processor_window.Ui_SansDat
         self.delete_row_button.clicked.connect(self._remove_rows_requested_from_button)
         self.insert_row_button.clicked.connect(self._on_insert_button_pressed)
 
+        self.event_binning_group_box.clicked.connect(self.on_compatibility_unchecked)
+
         # Attach validators
         self._attach_validators()
 
@@ -460,6 +466,9 @@ class SANSDataProcessorGui(QMainWindow, ui_sans_data_processor_window.Ui_SansDat
     def _on_insert_button_pressed(self):
         self._call_settings_listeners(lambda listener: listener.on_insert_row())
 
+    def _on_compatibility_unchecked(self):
+        self._call_settings_listeners(lambda listener: listener.on_compatibility_unchecked())
+
     def _on_help_button_clicked(self):
         pymantidplot.proxies.showCustomInterfaceHelp('ISIS SANS v2')
 
@@ -1943,3 +1952,7 @@ class SANSDataProcessorGui(QMainWindow, ui_sans_data_processor_window.Ui_SansDat
         self.data_processor_table.hideColumn(15)
         self.data_processor_table.hideColumn(16)
         self.data_processor_table.hideColumn(17)
+
+    def on_compatibility_unchecked(self):
+        if not self.event_binning_group_box.isChecked():
+            self._on_compatibility_unchecked()
diff --git a/scripts/Interface/ui/sans_isis/sans_data_processor_window.ui b/scripts/Interface/ui/sans_isis/sans_data_processor_window.ui
index 88b83c11430b093df8e1897afd0e8bb876764b6c..eb5d96e228eb5b11570791d3017b0f72f73e1a4f 100644
--- a/scripts/Interface/ui/sans_isis/sans_data_processor_window.ui
+++ b/scripts/Interface/ui/sans_isis/sans_data_processor_window.ui
@@ -804,7 +804,11 @@ QGroupBox::title {
                         </widget>
                        </item>
                        <item row="0" column="1">
-                        <widget class="QLineEdit" name="slice_event_line_edit"/>
+                        <widget class="QLineEdit" name="slice_event_line_edit">
+                         <property name="enabled">
+                          <bool>true</bool>
+                         </property>
+                        </widget>
                        </item>
                       </layout>
                      </item>
@@ -814,10 +818,10 @@ QGroupBox::title {
                   <item>
                    <widget class="QGroupBox" name="event_binning_group_box">
                     <property name="enabled">
-                     <bool>true</bool>
+                     <bool>false</bool>
                     </property>
                     <property name="toolTip">
-                     <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;When checked, the data reduction will run in the compatibility mode. This means that the reduction workflow is equivalent to the previous legacy reduction workflow. &lt;/p&gt;&lt;p&gt;ONLY UNCHECK THIS IF NOT PERFORMING BIN MASKING&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+                     <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;When checked, the data reduction will run in the compatibility mode. This means that the reduction workflow is equivalent to the previous legacy reduction workflow. &lt;/p&gt;&lt;p&gt;Left checked as there exist known issues with non-compatibility mode. This will be fixed in future releases.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
                     </property>
                     <property name="title">
                      <string>&amp;Use compatibility mode</string>
@@ -831,9 +835,6 @@ QGroupBox::title {
                     <layout class="QGridLayout" name="gridLayout_16">
                      <item row="0" column="0">
                       <widget class="QLabel" name="event_binning_label">
-                       <property name="enabled">
-                        <bool>true</bool>
-                       </property>
                        <property name="toolTip">
                         <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Rebin string for the initial time-of-flight workspace. This is only needed when using the compaptibility mode (ie when following the old reduction model). Note that this will only have an effect on event workspaces.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
                        </property>
@@ -844,9 +845,6 @@ QGroupBox::title {
                      </item>
                      <item row="0" column="1">
                       <widget class="QLineEdit" name="event_binning_line_edit">
-                       <property name="enabled">
-                        <bool>true</bool>
-                       </property>
                        <property name="toolTip">
                         <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Rebin string for the initial time-of-flight workspace. This is only needed when using the compaptibility mode (ie when following the old reduction model). Note that this will only have an effect on event workspaces.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
                        </property>
diff --git a/scripts/SANS/sans/gui_logic/presenter/run_tab_presenter.py b/scripts/SANS/sans/gui_logic/presenter/run_tab_presenter.py
index 8045593f010d781a440838b5ded3698515bbc634..3ef69d9aad59b11c89c3a391bb875633f1a5880a 100644
--- a/scripts/SANS/sans/gui_logic/presenter/run_tab_presenter.py
+++ b/scripts/SANS/sans/gui_logic/presenter/run_tab_presenter.py
@@ -106,6 +106,9 @@ class RunTabPresenter(object):
         def on_sample_geometry_selection(self, show_geometry):
             self._presenter.on_sample_geometry_view_changed(show_geometry)
 
+        def on_compatibility_unchecked(self):
+            self._presenter.on_compatibility_unchecked()
+
     class ProcessListener(WorkHandler.WorkListener):
         def __init__(self, presenter):
             super(RunTabPresenter.ProcessListener, self).__init__()
@@ -536,6 +539,11 @@ class RunTabPresenter(object):
         else:
             self._view.hide_geometry()
 
+    def on_compatibility_unchecked(self):
+        self.display_warning_box('Warning', 'Are you sure you want to uncheck compatibility mode?',
+                                 'Non-compatibility mode has known issues. DO NOT USE if applying bin masking'
+                                 ' to event workspaces.')
+
     def get_row_indices(self):
         """
         Gets the indices of row which are not empty.