and like this morning when I was doing a slow 1st and 2nd gear crawl in traffic it cut out. At one point there was a bit of space to move into the next lane and the car just started jerking when I put my foot down to move into it.
did you have you foot on the throttle at all? if so, the iscv should not be in play.
jerking when trying to accelerate does not indicate an iscv fault to me.