Testing goal line technology
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Goal line technology for football put to test

24 November 2011 Last updated at 15:30 GMT

One of the most contentious issues in world sport is whether a ball has crossed the goal line in the penalty box in football.

A Bolton-based firm called GoalMinder thinks it has an answer to the problem, with a new piece of technology.

The BBC's Richard Conway spoke to the co-inventor of Goalminder, Harry Barnes, and former player Lee Sharpe, an advocate of the technology, to find out how it could affect the game of football.