Investigators say the crash last summer was caused by a mechanical failure.
The tiny settlement becomes the first International DarkSky Community in England.
Visitors to a river captured by John Constable and now popular with stand up paddleboarders are asked to show respect.
The pilot, a man in his 80s, died at the scene and was the only person on board, police confirm.
Councillors say they want to visit the site before voting for its demolition.
The unveiling service was described as "moving" by former staff members of the defunct hospital.
More than £3,000 has been raised for the memorial, which will be unveiled on Thursday.
How did mangled crosses trigger a revival of interest in care for people with disabilities?
Essex Highways publishes photos of what it says is corrosion at the steel girder bridge.
