83-90 I was stationed in Holywood mostly on VIP security duties , watched the Tucanos virtually evey day, on day one was used as a chase plane for a short haul flight going into city with undercarriage problems , also saw the Kenyan ? ones with weapons fitted going out to play occasionally . Remember Alan Deacon being drowned in the North Channel following his ejection ,I believe he was doing stores jettison tests when one of them hit the tail-plane causing the aircraft to go out of control.