The inquest into the deaths of four people after a mid air collision over Bucks will not be heard until at least a year after the tragedy, a pre inquest review heard.

Speaking today, a coroner said the Air Accidents Investigation Branch (AAIB) report will not be ready until November - a full year after the four men lost their lives.

The crash between a helicopter and a Cessna aircraft happened last November over Waddesdon Manor, near Aylesbury, and caused the death of a an Army flight instructor and a civilian flying teacher.

There were two men in each of the aircraft, who were named as Captain Michael Green, 74, Saavan Mundae, an 18-year-old Bucks New University student, Jaspal Bahra, 27, and Trung Nguyen, aged 32.

Senior Coroner for Buckinghamshire Crispin Butler said at a pre inquest review that the official process could not move forward until the AAIB report had been finished.

He said: "The AAIB are still investigating, and the coronial investigation is still ongoing, although these are quite separate.

"The AAIB aim to finish their report by November, and so after that we will be able to move forward.

"It is likely that their report will form a significant part of the evidence before the a jury."

The estate was used to film the hit Netflix series Victoria and it was staff from the National Trust building at Waddesdon who were first on the scene and directed emergency crews to where the wreckage had landed.

One, who did not want to be named, said: "It was clear pretty quickly that no one had survived."

The wreckage was scattered over a wide area with the tail of the plane  landing a long distance away from where one of the wings had become lodged in a tree. The helicopter had caught fire on impact with the ground.  

Waddesdon Estate manger Len Bellis said he heard a noise "like a tin hanger collapsing."  Another bystander said that he heard the engine of one of the aircraft spluttering before the crash.  The estate and manor house are owned by the Rothschild Trust.

Capt Green, who was an experienced helicopter pilot working for Helicopter Services at Wycombe Air Park, was killed in the crash.

A former colleague, Capt Phil Croucher, said: "I shared a cup of tea with him only on the Thursday morning. He was a true gentleman. He was probably the most well-respected instructor in the country. He achieved a very high position within the Army as an instructor.

"He was an absolutely dedicated instructor. If you wanted a training instructor there's no one more highly qualified. Almost everybody in the country has been instructed by him. Most instructors have been trained by him."

The family of Mr Bahra, who was a flight instructor, said that he was “a kind-hearted, generous and loving person."

They added in a statement: "He was able to effortlessly make everyone smile with his infectious smile that could brighten up anyone's day no matter what they were going through.

“Jaspal's dream was always to be a pilot. This dream was fulfilled when he became a well-respected, admired, trusted and a highly qualified pilot with professional licences. As a Flight Instructor, Jaspal strived to serve in the professional development of his peers and students."

Another pre inquest review is scheduled for December in Beaconsfield.