Talling also launched a series of guided walks, enabling visitors to dive into London's watery history.

BBC: In search of London's lost rivers

Talling has made it his task to bring the English capital's lost rivers back to the surface, metaphorically at least.

BBC: In search of London's lost rivers

Talling passed around a painting dating from 1750 showing the same scene, only with ships and rowboats passing through an estuary lined with wooden houses.

BBC: In search of London's lost rivers

British Airways, which has a patent on the yin yang pattern, doesn't think direct aisle access is a major issue for most travelers, said Simon Talling-Smith, BA's executive vice president for the Americas.

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