One from Upper Heyford was lost in about 1972 when it had a control malfunction. That dumped its fuel before crashing somewhere near Buckingham. That one trailed a flame before coming down. I think the crew ejected safely before impact. I know this as I saw it while having a coffee in my office in Aylesbury. It was only later when I saw the news on the TV that it all slotted together.
On the subject of Heyford F-111’s. They used to pass over my office in Shefford, Beds in bevies of 1 to 4 aircraft on very long finals to Heyford.