The BS&WR had parliamentary approval to continue the line to Paddington station, but the approved route, which curved under the main line station and ended under the junction of Sussex Gardens and Sussex Place on a south-easterly heading, was not suitable for the company's plan to extend west or north-west from Paddington.
BS&WR havde parlamentatisk tilladelse til at fortsætte banen til Paddington Station, men den godkendte rute, der drejede ind under fjerntogsstationen og sluttede under krydset mellem Sussex Gardens og Sussex Place i en sydøstlig retning, egnede sig ikke til selskabets plan om at forlænge mod vest eller nordvest fra Paddington.