One of these is any item larger than the normal standard letter sizes. It does not matter how much one indicates it is paid at first-class rates, there is a built-in mentality about large envelopes, especially brown envelopes, that triggers in a sorting office clerk's mind the words "second class". Thus again today, three days after the stamps were postmarked, I have received a large first-class paid envelope from Birmingham, a mere 45 miles away.
After many attempts, I have determined it is impossible for mail to flow overnight between East Dereham in Norfolk and Banbury, and first-class costs are therefore a donation to the Post Office. I once believed it was only the Oxford sorting office that had these perverse habits. Would privatisation amend such monopolistic insensitivity?