A new footbridge, escalators and lifts are all ready under construction on the Luton town side of the platforms so there will be two bridge crossings.
Airport parking is going to be provided by building 2 new multi stories on the Dart side of the railway track. The real issue is that the airport hope to increase rail passengers from around 2.7 million to over 12 million so there will be even less chance of getting a seat in Harpenden and St Albans although more passengers will start using the Luton Express which will be non stop before it carries on up north.