I have created a DEM file, which I am using to draw a cross section along a line to see the variation of height from point A to point B along land seen below. 
When it use the Profile tool on the DEM file, it produces a cross-sectional area as seen below. 
I noticed from the profile that the elevation variation is correct, but my distance is out massively. A, because it doesn't give me units along the x-axis. B, because when I measure the same distance line from point A to point B on Google Maps, it gives me an accurate data which is massively out from the scale provided from using the profile tool.
Does anyone know why this is happening or how to fix it?
The steps I have taken to get to where I am now is..
Downloaded 'OSTerrain 50' ESRI shapefile from https://www.ordnancesurvey.co.uk/opendatadownload/products.html#TERR50
I converted the Contours from line.data to point.data as seen in the answer given in Creating DEM Contour files from shapefile line data in QGIS
this allowed me to create a DEM file using the
SAGA Triangulation tool. from this I created a cross-sectional profile.
The line I am requiring a cross-section profile of is starting at coordinates --> 60.471758, -1.291595 and ending 60.466071, -1.272155
I am using QGIS V 3.4
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