"Seriously a diversion safe, landing on a ocuppied runway, bonkers, and they call Ryanair cowboys."
Again it has to be asked, how much of the runway was blocked by the biz jet? Even if it was 1000m blocked on what another poster has claimed to be a 3400m runway, there would be enough distance left to carry out a legal approach and landing. (as long as ATC didn't close the runway). After all runways are occassionally shortened for works in progress and are still used!