'ONE' - The Many Versions of the 'ONE' livery
Sliverlink - With it's Cadbury Blue

And lime Green livery - Wasnt designed by Willy Wonka was it?
National Express - East Anglia & the dreadfuly sad attempt to run East Coast
East Coast...Grey, Grey, Oh and we'll throw in a pink band to not make the livery look so boring...
DRS's original livery - The original livery sat poorly on a 47, Whereas the Compass looks rather smart!
West Coast Railway Co's Sludge Brown - The original West Coast livery on 57601 looked rather smart, almost an inverted Fragonset, but sadly everything since seems to be unfortunatly in a sludge brown livery (Or an unfortunate shade of Maroon - Proper maroon is used on the coaches, so why not use more of that? And continue putting logos on the locos! Dirt brown unbranded livery looks rather dull when dirty! ala 47500...
Railtracks Livery on some locos - 31 & 73s
The meny versions of Southeastern - Just when you think theyve settled on repainted the fleet into one livery, it's time to start repainting it again! Which, dosent look to bad on a Networker, But looks bland on the already uninspiring design from Bombardier, The Electrostar!
The many versions of Northern Rail - Still a rather uninspiring attempt, and even that only took them the best part of 4 years!
And finally, for now at least, The Stansted Skytrain livery on the 322s...:roll:
>> Not such a livery, but one for the dullest design of unit, for me, has to be the 320/321/322!