In an interview in the Hindu, S Dinakar speaks to the former video analyst of the Indian team, S Ramakrishnan, on the various features of UDRS, how the technology works and its pros and cons.

Now we come to the heart of the matter. Why do inaccuracies creep in beyond the 2.5 metre mark? This was the reason that allowed Bell to stay at the wicket even when Hawk-eye showed the ball clearly hitting the stumps.

Over to Ramakrishnan: “There is more data to extrapolate and evidence from past data has shown that the chances of an error increase if the point of impact is more that 2.5 metres. In most systems, there may be a point from where the information may not be completely accurate.”