I would have thought the T3 would be on Hornby's hit list. What with the observation car, MK1 and maunsell in the range. A Swanage train pack would be an instant win you would think.
Anyway... I wonder if the good people at Rapido would consider an O1 train pack at some point? Seems like there are a nice selection of wagons in the range to match. Maybe with some sort of extra to lure people like unique wagon loads or something? A nice crew?