Double Exposure

When I got this film back from the developer I couldn't make out what had happened. It appears whilst on holiday in Croatia I took one with my Leica M6 of The Island of Our Lady before winding the film almost back into the spool and taking it out (to put a different film in).

I then loaded it into my Olympus and began shooting only for the first film on it to double expose when I took one of Uskmouth Power Station entrance, Goldcliff, Newport (South Wales, UK).

The chimney and the church have nicely lined up!

Camera:  Olympus 35SP (1972) with fixed G.Zuiko 42mm F1.7 lens (manual focus)

Film:        Kodak Colour ASA 200