This is the problem. Suppose Jose Fonte clears off the line, but the ball may have been over it, and Saints run straight down the other end and Rickie scores. When would you stop play? I don't have much faith in Hawkeye anyway, just remember the way that some of these balls move about and a spinning ball that rebounds off the posts or crossbar can be very unpredictable. Slow motion tv is also unrepresentative of what actually happened, just remember that injustice in the rugby world cup final. All you are doing is transferring the decision to another human in a box somewhere. Then there is the principle of having the same laws throughout all levels of football. We should never let money or television dominate the way that the game is played.
Hawkeye was developed at Roke Manor near Romsey. Various goal-line technologies have been tested at Staplewood in recent years.