The railway crossing at Amwell is still closed and the gates are locked. The materials to refurbish the crossing have been there for over a week now but Network Rail don't seem to be in any hurry to carry out the work. There is alternative parking by the old railway bridge on Holly Cross Road but there are only about 5-6 spaces. DO NOT OBSTRUCT THE GATES as they are in constant use.
There is an alternative place to park, also on Amwell Lane, that I would recommend. From the usual parking place go east towards Stanstead Abbotts until you come to Meridian Way on your left. Park sensibly on the road here. In between Meridian Way and Durham Close there is a track that leads to another railway crossing and on to Stanstead Lock. At the lock turn left and follow the Lee Navigation footpath to the viewpoint.