The yellowish stuff is just a plastic insert which I'm assuming is to give a better grip when it's clamped on. Looking at it in daylight, it's failed exactly where the split is where it tightens. Not sure of the age, but it's number 4130. I weigh in at 12 stone, and use a rear rack with 2 panniers. I've owned this Trice for about a year, but it was mint when I got it, so don't think it's been abused, or thrown over kerbs. I'm going to drop Ice an email, to see what my options are. Problem is that it's a QNT, as the Q wouldn't fit down the side of the house, so dropping on a cruciform may prove problematic. Plus I'm not sure if I've got the technical know how to swap everything over and set it up?
If price is too high then I'll look at the repair options. Typical, just when the weathers about to turn, the trike fails!