In pictures:England's techno tools
Hawk-eye

"Hawk-eye has been used by England for three years. It was set up for around 70,000 and is a key training tool at the Academy.

"It was developed for TV to track the flight and speed of the ball and help judge lbw decisions.

"We also use Hawk-eye on laptops at Test and one-day matches to help correct players' faults at short notice."

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