Light leaks Canon P

[Baybers]

It appears light is getting into the camera body from both above & below the film plane. This is not happening in every frame but maddingly enough to spoil a day's shooting.
I thought at first the second curtain was bouncing at the end of its travel (B&W photo) but I can't explain the leak on both sides of the exposure.
Any suggestions appreciated.

 

[Coldkennels]

The sharp edge of one of those leaks makes me think the swing back may be the issue. Have you checked and/or changed the light seals where the back meets the body?

 

[Baybers]

Cheers, will check.