There was an emergengy AD placed out by the CAA for any PtF aircraft with live MB automatic Ejection Seats with the sicssor shackle mechanism, to check routing of some of the attachment lines that coluld interfere with its relese function. A zero speed , zero height ejection is a very rare thing indeed and unfortunately this and the routing issue combined. I heard rumours about the first part, but only a Hawk pilot would be able to confirm if they are true or possible.