Interesting witness statement AJ3287.
The Trident was in a 'deep stall' at the time - very little or no control would have been available to the pilots, notwithstanding the fact that the captain was probably incapacitated leaving a very inexperienced copilot at the controls.
The engine fire you report was probably because of engine surges due to the disrupted airflow entering the engines at an extreme angle for which the intakes weren't designed.
Do you recall any noises/sounds?