If we must have this daft distinction between letters and large letters, would it really be asking too much for there to be some standard whereby the letters could either be sold pre-stamped or clearly marked on the packaging to say they were officially large?
Maybe IABU but it is SO annoying.
DH sent his dad a Father's day card. It was posted first class on Friday so he thought it would get there in time. Not only did it not arrive until early this week, but it had to be collected from the sorting office because they said it was inadequately stamped. To cap it all FIL not only had to pay the shortfall but an additional £1 handling charge to get his card. It wasn't even an especially large card but it had three foldy bits so it qualified as a large letter on grounds of its thickness.
FIL said when he collected it there was a box of around 200 cards that were all waiting to be collected - same story.
It just feels as though they didn't really think things through when they made this change. Either that or they decided they just didn't give a stuff about people getting mail delayed or not delivered.
A few months back a work colleage posted his wedding invitations - around 50 in all. Only later did he find out that they were just too thick and many of the people they invited had to pay to collect them.