sentences:  A new viaduct would have run alongside the Grand Union Canal from Old Oak Common to Harlesden, and the first stop out of Paddington station would have been Wembley Park, for connections to the Metropolitan line and Jubilee line.Later plans replaced all this with a new tunnel connection, and finally the Aylesbury branch was dropped completely from the scheme.During the late 1990s, BAA planned to run some or possibly all Heathrow Express trains along the line to St. Pancras.