Between January and June 1998, the Heathrow Express shuttle service was built to connect Paddington station to Heathrow Airport. A new spur was built from the existing Great Western Main Line to the airport, running mostly in tunnel.
Between January and June 1998, a dedicated train service was introduced to connect Paddington station with Heathrow Airport via the Heathrow Express shuttle service. This involved constructing a new rail line from the existing Great Western Main Line to the airport, primarily underground.