Some 12yrs ago an aircraft landed on a taxiway in Gatwick. As in this case there were no injuries or fatalities as luckily there was no other aircraft on the taxiway. The initial reaction by many people was to call the said pilots incompetent etc. etc. The subsequent AAIB report reached the conclusion that one of the main contributing factors was that with the ILS off the air on the main landing runway, the crew were asked to land on the other runway (Rwy08L) which has no ILS. The lighting etc. was confusing to the crew and they landed on the taxiway to the left of 08L.
Dunno what happened in this case, but before some people with profound knowledge of what goes on in a cockpit comment they'd better wait to see what led to this happening.