Ah yes, I forgot about the tomestone colours. Back when Sky had a new look for their channels almost every year. It slipped under the radar.
They only really had 3 different tombstone versions between 1993 and 1997, the latter two were quite similar, but with the 'silk-effect sheet' revealing the logo in the second one.
The following 'egg' series was still quite a unified presentation package across the network, using different colours, but still lasted little more than a year.
From 1998 all the channels started to diverge for the next 13 years, but Sky One/1 was still updated every 2 or 3 years.