Lambie-Nairn’s idents returned in 2014. But they were originally developed in 1991. At the time, they were credited with transforming wider perceptions of the channel. It had been seen as dull and worthy, but became arty and exciting.
27 years is a hell of a long time for these idents to last, especially considering the subsequent shift to widescreen, then HD broadcasting. They have pretty much stood the test of time.
Later idents in the set became more complex and less focused. But I am especially fond of the very original idents from 1991, which were particularly pure and striking. The use of the Gill Sans 2, coloured with viridian, and backed with ethereal music, is such a simple idea, yet it was employed with remarkable versatility.