Aircraft was one of several aircraft taking part in a Trans-Atlantic air race. It was N-reg.
From memory, there was two people on board and was under the control of Glasgow Radar and on a closing heading for the ILS on 05 when it continued the descent and crashed on about a 8-mile final near Lochwinnoch.
The two pilots on board had been flying for some considerable period of time.
The non-flying pilot was believed to have been asleep while the flying pilot had simply reached his limit and fell asleep at a critical stage.
It occurred in the early hours of the morning.