Power Query is clever enough to recognise in most cases non-empty columns, default delimiter and encoding. Another story if on next steps you transform your columns somehow, you shall take new column(s) into account as well.
@PascalKTeam Thankyou this was really hepful. Exactly what I needed. Took me a couple of mins to figure out I needed where I needed to edit it....... didn't have 'Forumla Bar' enabled under 'View'. Got there in the end.