The company I did my apprenticeship at, Flight Refuelling (now Cobham) had a similar incident in the 60s apparently. To celebrate some event (probably to do with an exploit of the founder, Sir Alan Cobham) the RAF were to carry out a flypast / small display over the Wimborne factory and all the employees came out onto the riverbank to watch at the arranged time. Some rumblings were heard in the distance and it appears the RAF had incorrectly turned up overhead the similar sized Hamworthy Engineering factory in Poole, some 6-7 miles to the south.
Word got round quickly of the RAF's "mishap" and the story has it Sir Alan phoned up a good friend of his at the Fleet Air Arm in Yeovilton and with the Senior Service keen to get one over the RAF, a pair of Sea Vixen's airborne in Lyme Bay quickly obliged and carried out the flypast and display. The event is mentioned in the book "In Cobham's Company" by Colin Cruddas with the note that one of the Vixen's flashed past so low there were visible strong ripples on the surface of the River Stour in front of the factory.