A tunnock’s florida orange is great as well, but I don’t know if they make them any more - they were rarely seen anyway, the only time I remember having one is out of the tunnock’s shop in Uddingston.
http://www.nicecupofteaandasitdown.com/biscuits/previous.php3?item=146
I went on a school trip to the tunnock’s factory once, it was great - they let us have teacakes fresh off the line before the chocolate had properly melted and we could have our fill of rejected caramel wafers (that were too long or oddly shaped, etc).