IF a significant part the airport fire cover is at the crash site then the airport will be below the required fire cover and will therefore be closed for some considerable time
BBC are showing footage. It went down during / after the 'break' to land - looks like they did a pass over the airfiled in V formation then broke to land - the 2nd aircraft to break just went down during the turn. It was still generating smoke which would suggest the engine was still running as I beleive the smoke is generrated using the heat of the engine exhaust - however that doens't show wether the engine was generating decent thrust or not - just that the exaust was hot. However I'm not going to speculate at this point - merely pointing out what is evident from watching the footage
Unfortunately no seat or chute was evident in the footage.
Doesn't look too good i'm afraid.