I find it very hard to believe that the crew of an aircraft which can navigate half-way across the world to strike a pinpoint target would just somehow fail to find its display destination, especially if it was receiving an ATC radar service at the time.
Ha! You should have been at various Barton airshows in the '80s! US display aircraft frequently failed to find the field despite a radar service from Manchester. One guy did find us, did one fast, low pass..... and then lost the field and was never seen again (got low on fuel and had to return to base befor he managed to find us again)!
Never had any problems with RAF display acts at those shows.