I was watching this interesting documentary and spotted what appeared coach K next to the DVT at Kings Cross when forming a down Pullman to Leeds as well as the buffet/kitchen being fitted out with first class seats. I do recall reading somewhere that when they were first delivered that IC225s ran around in different formations to the present uniform 3xFO, 1xRSB, 4xTSO and 1xTSOE. So my question is what formations did they have when first delivered and when did it change to the present uniform formation?