February 1991: brand specialists Lambie Nairn produced their first set of BBC Two logos, part of a new look for the channel.
Initially all the logos appeared in the colour viridian. However, the idents matured over the years, becoming individual characters on a yellow background, and latterly as a cut out 'window on the world'.
All have been hugely popular with the public. Celia Chapman, Executive Producer, Lambie Nairn said: "BBC Two was probably the first ident that got its own fanmail!"