<p>Thanks for the replies. It wasn't diagnosed as a light leak by Olympus, I just presumed that's what it was as the seals were rotten. So it could well be another issue. <br>
The strange thing is that it doesn't occur on every photo, maybe 2-3 out of a roll of film. It does however happen with both the 50mm and 28mm lens.<br>
With regards to light coming in the top right and hitting something, I did remove a hair that was wedged between the mirror and the film. It could be that light was coming in, hitting the hair and distorting the photos.<br>
Cheers</p>
<p>Drew</p>