Now that is ugly. Sure looks like the clutch was dragging for some reason. I'm curious to see the slave cylinder for the clutch release mechanism. If I was Triumph, I'd want the complete clutch system sent back including the complete hydraulic (master cylinder/slave) assembly.
I remember working as a mechanic for a GM dealership in the 70s and a cruise control system on a Chevy sedan suddenly went to full throttle at an intersection. The owner was pretty upset (and rightly so). GM had us replace everything including the actuator arm on the steering column, wiring harness, sensors, slave cylinder, linkages etc etc. Everything was sent back to GM for analysis. They had never seen it before. Anyway, from what I remember there was some kind of redesign. I wonder if this is a one off or....... I trust they will sort it out.