ISTR a Nav School Dominie was barrelled from Finningley, possibly on an exercise to Gib. c. 1974.
Word was the culprit was a tad senior for such malarkey.
The bugger did it on one of my route forecasts too! I required the utmost probity from aircrew that I trusted with a MetForm 2305 [number might be wrong]. Pretty clouds and the occasional eagle sneaked in somewhere.