One of the hidden rules of British behaviour is that gentlemen only turn back the cuffs of their shirts two or three turns. Turning the cuffs back to above the elbow is considered to be very much "working class" (and decidedly non-U).

Short sleeve shirts tend to be very much a matter of personal taste, and those chiefs (certainly U) who spend much time at Scottish games in the USA will be seen in short sleeve shirts; the Earl of Caithness comes to mind in this instance. Indeed, the short sleeve shirt is not and was not unknown in Scotland; a quick glance through those "Clan and Tartan" books published by Johnson and Bacon in the immediate post-war era have several illustrations of men in kilts wearing short sleeve shirts.