Flight data and voice recordings from the helicopter which crashed outside Leicester City's stadium have been successfully downloaded, as the wreckage was moved to a specialist facility.
Owner Vichai Srivaddhanaprabha was among five people killed in the disaster on Saturday night.
The Air Accidents Investigation Branch (AAIB) said it was able to obtain information from the AW169 helicopter's black box despite it being subject to "intense heat" in the post-accident fire.
Inspectors have begun a detailed analysis of the data as they attempt to find out what caused the aircraft to plunge to the ground shortly after take-off.
A crane lifted the wreckage from the crash site near Leicester City's King Power Stadium on Thursday night.
It has been moved to the investigators' headquarters in Farnborough, Hampshire, where it will be laid out for a more detailed examination.
Thai media reported that the club owner's body has arrived in Bangkok ahead of his funeral on Saturday.
Leicester manager Claude Puel has said he would give the players the opportunity to travel to Thailand for the funeral.
The AAIB gave an update on the investigation today, thanking members of of the public who send in videos and photographs of the disaster.
The statement said: "Following the tragic helicopter accident on Saturday 27 October, our inspectors and support staff travelled to Leicester to start an investigation.
"Our inspectors have now gathered and documented the evidence that could be collected while the helicopter was in place where it came to rest.
"Last night, our engineering support staff oversaw the careful lifting of the wreckage.
"The wreckage has now arrived at our specialist facility in Farnborough, where it will be laid out and more detailed examination can continue.
"The digital flight recorder is in our laboratory. Although subject to intense heat in the post-accident fire, initial work on it has allowed us to successfully download the recordings.
"Our inspectors are verifying the extracted information and have started the detailed analysis of its contents.
"We would like to thank everyone who responded to our witness appeal. Our investigators are examining the videos and photographs we have received.