In days of old it was "The White Heather Club" at midnight on BBC TV. Live...
Actually, it wasn't. The Scottish Hogmanay shows were usually recorded at TV studios, or at somewhere like the Aviemore Centre in the dog days between the summer and the skiing season. Far too risky to have a live show featuring real Scottish people and strong drink. This also enabled Moira Anderson or the Alexander Brothers to entertain us whilst actually sunning themselves - or earning top dollar - thousands of miles away from the cold and filth of a Scottish winter.
Twas only fairly recently - which to me means 30-40 years ago :) - that they went live.