Pontius, absolutely right! I do remember bombing Glasgow bombplot with the BS missile between 68 and 69, before we converted to FF. Gernish I also remember, but at the same time as Glasgow. We used glasgow fgor the high level BS profile, and Gernish for the pop-up from LL for the BS FF attack (8K alt I seem to remember).
Probably an accurate guess at a GroupEx en-route to the NTP.
When was the 112SU range built? Don't remember it from BS days...?