The next stage of work on the £225m Luton Direct Air Rail Transit (DART) is underway.
The fast transit's energy-efficient, cable-hauled propulsion system at London Luton Airport is already in place and now the carriages are being lifted onto the guide rails.
The trains will shortly be seen moving for the first time along the 2.1km route between the terminal and Luton Airport Parkway station, on their way to the maintenance units for works to prepare them for service.
The DART aims to provide faster and greener rail transfers between London Luton Airport and London St Pancras, passengers are expected to be able to travel between the stations in a minimum of 30 minutes.
Network Rail continues to work on construction of a new bridge, escalators and canopies at Luton Airport Parkway station that will allow train passengers to continue the next phase of their journey.
The scheme's final major building work will be constructing the link building between the DART and mainline stations at Parkway.
The Luton DART has employed 38 apprentices and provided bespoke training for more than 720 people to gain work experience and qualifications that will help them enter the construction industry.
The DART is due to open in 2022.