Westminster Abbey: Behind Closed Doors - Season 1 Episode 2 -

With the Abbey hosting memorials of national importance, it is crucial that its ancient structure is in tip-top shape. Clerk of the works Ian Bartlett puts the finishing touches to a serious problem on the roof. His deputy Iain McDonald carries out a survey of the Abbey's iconic Hawksmoor towers, which means abseiling 69 metres above the structure's main exit