The squadron began to re-equip with the Tornado F.3 in 1990. Throughout its time at Leuchars the No. 111 (F) Squadron was tasked with the maintenance of Quick Reaction Alert, which involves keeping aircraft at a high state of readiness to intercept, identify and, should it be necessary, destroy hostile aircraft approaching UK airspace. The squadron was involved in Operation Deny Flight and Operation Deliberate Force over Bosnia, Operations Bolton and Resinate in the Middle East and regularly participated in major Air Defence exercises, both in the UK and abroad.