Lexi Thompson mistake: We're talking 'millimetres'

American golfer Lexi Thompson was left in tears after being handed a four-stroke penalty while leading the final round of the first major of the season. The penalty came when a television viewer spotted she had made a mistake earlier in the tournament which ultimately changed the outcome of a golf tournament.

Bernard Gallacher, former Ryder Cup captain, tells the Today programme the LGPA had the power to dismiss the TV viewer and should have completely ignored them.

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