diff --git a/MantidQt/CustomInterfaces/src/EnggDiffraction/EnggDiffractionPresenter.cpp b/MantidQt/CustomInterfaces/src/EnggDiffraction/EnggDiffractionPresenter.cpp
index 18e9d1e52e7214993e8e7598533b7214a54c94c9..4af261d707060cee834e1e673087a71c80e5d715 100644
--- a/MantidQt/CustomInterfaces/src/EnggDiffraction/EnggDiffractionPresenter.cpp
+++ b/MantidQt/CustomInterfaces/src/EnggDiffraction/EnggDiffractionPresenter.cpp
@@ -36,7 +36,8 @@ const std::string EnggDiffractionPresenter::g_shortMsgRBNumberRequired =
 const std::string EnggDiffractionPresenter::g_msgRBNumberRequired =
     std::string("An experiment reference number (or so called \"RB "
                 "number\" at ISIS) is "
-                "required to effectively use this interface. \n") +
+                "required to effectively use this interface, "
+                "this can be entered at the top of the screen. \n") +
     "The output calibration, focusing and fitting results will be "
     "saved in directories named using the RB number entered.";
 
@@ -2173,7 +2174,7 @@ void EnggDiffractionPresenter::doRebinningTime(const std::string &runNo,
 void EnggDiffractionPresenter::inputChecksBeforeRebin(
     const std::string &runNo) {
   if (runNo.empty()) {
-    throw std::invalid_argument("The run to pre-process" + g_runNumberErrorStr);
+    throw std::invalid_argument("The run to pre-process is invalid. The run" + g_runNumberErrorStr);
   }
 }
 
diff --git a/docs/source/interfaces/Engineering_Diffraction.rst b/docs/source/interfaces/Engineering_Diffraction.rst
index db2fb36670ea849836f3b983d8bc448ecaaba40b..923ad140647100677f91b5ff729acbb995b2e646 100644
--- a/docs/source/interfaces/Engineering_Diffraction.rst
+++ b/docs/source/interfaces/Engineering_Diffraction.rst
@@ -37,7 +37,7 @@ Close
   Close the interface
 
 Status at the bottom of the interface
-  Here there will be a short message that indicates whether the last
+  A short message will be displayed which indicates whether the last
   important calculations finished successfully, and when the interface
   is busy calculating (calibrating, focusing, fitting, etc.).
 
@@ -78,8 +78,8 @@ box has been enabled.
 
 The plot Calibrated Workspace check-box will enable user to plot
 vanadium curves and Ceria peaks. For Ceria peaks there will be two
-workspace generated and plotted, one for each bank, whereas for a
-cropped calibration there will only be only one workspace generated
+workspaces generated and plotted, one for each bank, whereas for a
+cropped calibration there will only be one workspace generated
 and plotted, depending on the selected bank or provided Spectrum
 IDs. The workspace contains difc and tzero data which is then
 utilised to plot the Ceria peaks per bank, the graph will plot Peaks
@@ -91,7 +91,7 @@ The calibration files are written into two different output
 directories. First, they are written to a user specific directory
 which for the ENGIN-X instrument on Windows systems is:
 
-`C:/EnginX_Mantid/<Username>/<RBNumber>/Calibration`
+`C:\\EnginX_Mantid\\<Username>\\<RBNumber>\\Calibration`
 
 On UNIX based platforms this path is:
 
@@ -99,7 +99,7 @@ On UNIX based platforms this path is:
 
 They are also copied into a general (all) output directory:
 
-`C:/EnginX_Mantid/Calibration` on Windows or
+`C:\\EnginX_Mantid\\Calibration` on Windows or
 
 `~/EnginX_Mantid/Calibration` on UNIX platforms.
 
@@ -219,8 +219,8 @@ number of focus runs that could not be processed.
 The focused data files are saved in NeXus format into the user
 specific and general directories (as with the calibration output
 files). That is the files are written into
-`C:/EnginX_Mantid/User/<RBNumber>/Calibration` and
-`C:/EnginX_Mantid/Calibration` on Windows, or
+`C:\\EnginX_Mantid\\User\\<RBNumber>\\Calibration` and
+`C:\\EnginX_Mantid\\Calibration` on Windows, or
 `~/EnginX_Mantid/User/<RBNumber>/Calibration` and
 `~/EnginX_Mantid/Calibration` on UNIX platforms.  See below for
 additional, optional outputs.
@@ -268,13 +268,13 @@ files by clicking the Output Files checkbox. This will generate three
 different files for each focused output workspace in Mantid. These
 files can be found with appropriate name within:
 
-`C:\EnginX_Mantid\<User>\<RBNumber>\Focus` on Windows or
+`C:\\EnginX_Mantid\\<User>\\<RBNumber>\\Focus` on Windows or
 
 `~/EnginX_Mantid/Foxus` on UNIX systems.
 
 The files are also copied to the general (all) output directory which is
 
-`C:\EnginX_Mantid\Focus` on Windows
+`C:\\EnginX_Mantid\\Focus` on Windows
 
 `~/EnginX_Mantid/Focus` under on UNIX systems
 
@@ -321,7 +321,7 @@ convention:
 
 - *engggui_preproc_by_pulse_time_ws*
 
-Focussing uses the algorithms :ref:`Rebin <algm-Rebin>` and :ref:`Rebin
+Focussing uses the algorithms :ref:`Rebin <algm-Rebin>` and :ref:`RebinByPulseTimes
 <algm-RebinByPulseTimes>` to bin the data in different ways when
 converting event data into histogram data.
 
@@ -332,7 +332,7 @@ Fitting
              early stage of definition and implementation. Not all
              options may be supported and/or consistent at the moment.
 			 
-.. warning:: The input workspace must be converted into a focussed file
+.. warning:: The input workspace must be converted into a focused file
 			 first. The steps to complete this are found here: :ref:`focus-Engineering_Diffraction-ref`
 
 The Fitting tab provides a graphical interface which fits an expected
@@ -442,7 +442,7 @@ as well. Users may also zoom-in to the graph by holding left-click
 and dragging a box on the plot, and zoom-out by left-clicking on
 the plot.
 
-When user is satisfied with the center position of the peak, you may
+When user is happy with the center position of the peak, you may
 add the selected peak to :ref:`ExpectedPeaks-Engineering_Diffraction-ref`
 list by clicking Add Peak button. User may rerun Fit process by
 clearing peaks list using Clear button and manually selecting peaking
diff --git a/docs/source/interfaces/Engineering_Diffraction_TestGuide.rst b/docs/source/interfaces/Engineering_Diffraction_TestGuide.rst
index a6dfd9fb918af210d0a09b2e2a3105973a400a90..cc54a4a7b37dd228248f9672f69b6019c9f134d8 100644
--- a/docs/source/interfaces/Engineering_Diffraction_TestGuide.rst
+++ b/docs/source/interfaces/Engineering_Diffraction_TestGuide.rst
@@ -35,7 +35,8 @@ Calibration
 The first time the interface is opened it will be disabled except for the RB number entry box
 and a pop up box which should prompt for a RB number. For testing purposes this can be anything.
 
-If a vanadium calibration has not previously been run the `Current calibration` will be empty.
+If a vanadium calibration has never been run the `Current calibration` will be empty. Once
+a calibration has been run these fields will retain their values for future runs of the program. 
 The following files can be used for the calibration run.
 
 - *Vanadium#*: ENGINX00236516.nxs