They arrived by RM, P-a-L.
.........as did the second pair that arrived today that I hadn't actually ordered! Most odd - even by QVC standards.
However, the first pair were clearly returns as the packaging was less battered on today's offering (intact box, no screwed up tissue etc, etc) so if I decide to keep one pair, I shall weigh them up carefully.
Two more minus points for me are the lack of sprung sides/arms that I thought would be useful for manoeuvring over another pair of specs and no visible screws so if the arm breaks there is no obvious way of replacing it.