BBC Christmas Idents montage description

All of the BBC Christmas Idents have many things in common. One being that they always have the BBC logo and some form of a circle within them, ranging from an image of the world and just a general circle. Another one would be that they always have snow and something christmassy. EG in the 1977 Ident, they had a Christmas pudding as the 'circle' with white icing looking like snow.