In 1956, the first such bus set out from London with about two dozen passengers. The bus tour left London on April 15, 1957, and reached Calcutta on June 5.

For £145 (equivalent to £2,950.82 now), passengers experienced what was considered the longest bus route in the world, spanning 10,000 miles one way, passing through various countries.

Route 607 London Transport trolleybus on its way to Hanwell, west London,on June 15, 1948 (Picture: Warburton/Hulton Archive/Getty Images) Then a newer creation, the trolleybus, arrived in 1935 ...