I was down at DSA yesterday and was quite concerned as the daily Ryanair flight was on its approach to runway 02 a helicopter suudenly appeared. The tower controller then had to warn the Ryanair pilot that he was unable to make contact with the intruder and that he was only 500 feet below the aircraft.
Was joined by some fellow spotters who claimed it was the third such incident in the last 7 days.
Also noticed thereafter that the tower controller seemed more vigilent than usual in tracking the position of all traffic in the area and refused some requests from local pilots to do touch and go's, stating that he was expecting incoming aircraft in the next 30 minutes.
Hope they can sort things out soon.