Back when I was getting my PPL, we had a very conscientious controller in the tower who would check retractable aircraft had their wheels out when issuing a landing clearance and she saved a few insurance claims. Noted that this involved light aircraft with less reliable undercarriage systems and lesser experienced pilots.[/QUOTE]
Maybe we need to resurrect the Jet Provost system? "Finals 3-Greens (Beep-Beep-Beep) for those who remember