The brickwork around the front windows and the top of the door is a different brick - looks like someone bought door and windows, then changed the shape of the original openings to fit them in.
The brickwork on the gable end is a bit patchy, looks as though some other building was attached to it at some point.
Serious damp/condensation indoors too.
Re signs on the front, is the Ancient Drovers Way to the front or the side? There are no signs on the house on the Google Earth image.
Definitely a case of full structural survey.