The new line is named after Queen Elizabeth II.Insider The Elizabeth line that runs under central London opened in May and runs trains to Heathrow. I would normally use the Heathrow Express to go to the airport, which costs $30 one-way. The journey on the new railway still felt quick – and it saved me nearly $20. I took London's new Elizabeth line to go to the airport instead of using the Heathrow Express – one of the world's most expensive railways.The Elizabeth line train's design is sleek.Philip Toscano/Getty ImagesI took the train from Paddington station, which is where the Heathrow Express terminates, to compare the two services.A sign in Paddington station.InsiderWhen I arrived at the platform, the train was entering the station and once passengers alighted, cleaners hopped on board.The train was easy to find.InsiderAlthough train care staff have been around for a while, at least in London, it felt different to other train services.