For decades, passengers transferring between Luton airport and the nearest rail station have had to endure slow and unreliable bus services, which all too often become entangled with traffic approaching the Bedfordshire airport.
A promised Direct Air-Rail Transit (Dart) was due to open in 2021, connecting the terminal with Luton Airport Parkway rail station. But the Covid pandemic and other problems led to repeated delays with the project, while the cost ballooned and is now approaching £300m.