TREACHEROUS SEAS

Lighthouses: Building The Impossible, 9pm, Ch5

ROB BELL is at the Longstone lighthouse on the Farne Islands off Northumberland. In 1838, it was the location of a dramatic rescue, spearheaded by lighthouse keeper’s daughter Grace Darling (pictured) — who became a national heroine. Rob shows us how deadly these waters are, and ends the series on a fitting tribute to lighthouse keepers everywhere.