Heathrow Connect

Heathrow Connect is a train operating company in London provided jointly by Heathrow Express and First Great Western, connecting Heathrow Airport with Paddington Railway Station. The service follows the same route as the non-stop Heathrow Express service but calls at certain intermediate stations, connecting several locations in west London with each other, the airport, and Central London. It runs every half-hour throughout the day and evening.

More information on the Wikipedia page.

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