On a Micky Finn two Vulcan crews went from readiness 15 to airborne in under 3 minutes. They were at, I think, Brawdy and sunning themselves under the aircraft.
We had a spectacular 10 minute launch once. We were in a Vulcan near the ORP at Cottesmore when we went u/s. We shutdown and piled out into a crew bus that had been summoned. We were then driven flat out to the engine running spare in one of the mid-airfield dispersals. Once there we sprinted to the aircraft. The start crew captain was holding the ladder to show his authority. His crew formed a chain and slung all our baggage from bus to jet. Cocks away, doors closed and taxy. I sorted out the heap of junk and set about helping the pilots strap in. Strapped in I lived their seats and strapped in to mine as we rolled.
At rotate we hit a wall of snow that the other aircraft in the stream had dumped at exactly the same point on the runway.
It was, as I said, about 10 minutes from u/s to airborne in another jet. It was on that sortie that we attacked a French airfield at low level at a shade over 400 kts.