New World Record Set in 400 Meters

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Jo Jackson has set a world record in the 400-meter freestyle at the British swimming championships.

The Olympic bronze medalist finished in 4 minutes, 0.66 seconds
Monday, lowering Federica Pellegrini's mark by almost a second.

Two-time Olympic champion Rebecca Adlington finished second,
also under the old mark, touching in 4:00.89.