A red graphics strip is superimposed between the stumps to show where the ball pitched, and on which line the ball was travelling when it struck the batsman. The Red Zone is now familiar to TV audiences as part of the Hawk-Eye LBW package.

It's often one of the most difficult tasks for an umpire: discerning whther a ball has clipped the bat or part of the player's protective equipment or clothing on its way to the wicketkeeper. Although not used in this decision-making process, the Snickometer has proved to be a very useful TV tool to help commentators and viewers judge whether the ball made contact with the bat, gloves or nothing at all.

The 2001 Ashes series continues at Headingley in Leeds, and is another massive production effort by BAFTA-winners Sunset+Vine for Channel 4. This plan shows you the angles you'll be able to watch the game from on television.

Hawk-Eye is the revolutionary ball-tracking system which enables Channel 4 viewers to get the most information about how players are really performing against each other out in the middle.