BBC news report
If correct, seems witness had ac in sight for some time?? on fire on approach? had it impacted earlier out of sight?
"Eyewitness Dennis Gough, who was playing golf by the runway at the time, said he saw the plane coming in to land.
'Leaning to one side'
"As it was coming to land it was on fire and as as it approached the runway it looked like it was leaning to one side slightly," he said.
"Then, once it hit the runway there were sort of flames alongside the runway then it broke into a big fireball."