There was at least one live one loaded on a non-QRA aircraft. I touched it. During an exercise "somewhere in the middle of England" (actually about 4 miles from Oakham), we went to our aircraft one cold morning and we were more than mildly surprised to see a live round hanging in the bomb-bay. There was an Irish Republican Army security alert on at the time and I could not help noticing that the aircraft was dispersed not very far from a pretty feeble looking perimeter security fence. I strolled, as casually as possible, over to the aircraft guard who was carrying a Stirling sub-machine gun and asked him whether his gun was loaded. The reply was "Not likely Sir. They would not give us live bullets when it is only an execise".
Turned out "they" had run out of dummys to load for the exercise and had decided to use the real thing.