Lighthouses: Building The Impossible, 9pm, Ch5

LIKEABLE engineer Rob Bell is back to guide us through the history of three more rock lighthouses along our beautiful but treacherous coastline. At the mercy of the elements, these remarkable structures are the focus of dramatic stories of shipwrecks, rescues, endurance and survival. Rob begins at Wolf Rock, eight miles off Cornwall; it took eight years to build in the 1860s, thanks to the wild weather off Land’s End.