A signature bridge is a bridge that makes a statement but is now being described as an asymmetric structure and a gateway bridge which will be back lit with LED's. The ski slope is meant to represent an aircraft taking off. Luton has a long history of not building to artists impressions so we will see what the airport ends up with.
https://knightarchitects.co.uk/proje...luton-gateway/
Photo of the Parkway station construction site at the bottom of this link.
https://dart.llal.org.uk/