The station has been perennially popular for passengers and goods, particularly milk and parcels. Major upgrades took place in the 1870s, the 1910s and the 1960s, each trying to add additional platforms and space while trying to preserve the existing services and architecture as much as possible. Paddington was first served by London Underground trains in 1863, as the original western terminus of the Metropolitan Railway, the world's first underground railway. In the 20th century, suburban and commuter services appeared at Paddington as the urban sprawl of London moved westwards. Despite the numerous upgrades and rebuilding, plus damage sustained in particular during World War II, Brunel's original design is still recognisable.