In Britain those marks were elevated to the same height of the top of capital letters ( claim that the reason for this was a practical one, in order to get a character that was clearly distinguishable from the apostrophes, the commas and the parenthesis (also, in other scripts, the angular quotation marks are distinguishable from other punctuation characters—the Greek breathing marks, the Armenian emphasis and apostrophe, the Arabic comma, decimal separator, thousands separator, etc.).
claim that the reason for this was an aesthetical one.
Earlier British usage was often identical to American.
Different varieties of English have different rules regarding whether neighboring punctuation should be written inside or outside the quotation marks.
The single quotation mark emerged around 1800 as a means of indicating a secondary level of quotation.