Describe the 'hanging throttle issue'.
When it happens and how it behaves.
There is some earlier discussion on this topic here
http://www.talkmorgan.com/ubbthreads.php/topics/129974/Re_New_Roadster_Clutch_Gearbox#Post129974Quote from the above post,
[I have an early Roadster and can confirm the revs have always hung and this is my biggest bugbear with the car. I have learnt to live with this by changing up through the box slowly to enable the revs to fall off between gears. However I had a serious trouser moment recently when the car broke traction on a damp road in third, lit up the rear wheels and I was unable to back out of the throttle BEWARE it is not entertaining.
I reported this in writing to the factory back in June 2012 when the car went in for its first service and at the time there was no fix but now I feel there needs to be.
I have just returned from California where I deliberately hired a 3.7 Mustang I could not get that to misbehave in the same way..]
Car is booked for 10,000 mile service at the the factory and this issue is at the top of my snagging list.