I mentioned this in the BBC News thread, but it's more appropriate here - as there doesn't seem to be much online any more about the early years of UKTV, I have done a page summarising the idents used between 1997 and 2004, when the presentation, in my mind, was a lot more interesting than it is today. Nowadays to me UKTV feels more like a random assortment of channels than a coherent network, especially after the removal of the unifying prefix from the channel names in 2008-09.
Boy, those original UKTV idents were gorgeous. Such a shame we never saw them in widescreen as intended.
Also I didn't realise the BBC had complete editorial control over the UKTV channels. That really does explain why they were identical presentation wise to the BBC channels, they even used programme slides!