Aussie
But I take your point that one might not visually pick-up absolutely everything that might be about to cross the runway - fair point (but you'd hope if TWR had cleared e.g. vehicles across the RWY that he/she then WOULD be talking to the traffic on final!?)
Glad to hear you feel it is relevant
irrespective of it being the wrong airfield there were a number of visual clues which in theory should not have let the incident happen.