I was lucky enough to see one in the early 90s at Waddo after I took my then pre school son over to the public viewing area to watch the usual nothing happening
No one about at the old pre tarted up car park but then a guy turned up and asked if anything unusual had come in. Nope nothing in the last hour but in the space of half hour, the place went mad to the point that the local plod took over traffic control on the A15
Then the hangar doors opened and there it was, complete with the usual circus as it took of to the west form teh A15 threshold givinga perfect view
There must have been a few snaps taken that day. I gather the fog prevented it landing at Alconbury over night so it dropped in to Waddo for some B and B