@ RAF96 Hi Rob Re nos on HSTs. I'm not 100% certain but I do know the early HST set numbers were applied to the nose - the 43xxx was the side number - 43007/43008 set no 253 004, 43009/43010 set no 253 005 etc.. This use of set nos on the nose didn't last long due to the difficulty of keeping 2 units together when only one had a defect. For a period some powercars had the side no also on the nose. Not 100% certain, as I said at the start, but logical, given the known facts. 😀