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Airman on the Run

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Welsh hero of World War II: Eileen Younghusband

Jane Solomons has been hearing from Eileen Younghusband from Sully, who processed radar information in the secret Filter Room.

She tracked friendly and hostile aircraft to warn of enemy attack. All the mathematical calculations were done in her head under great pressure.

You can catch 'Welsh Heroes of World War II' tonight at 10.35 here on ITV1 in Wales