How far does it open? If its just an occasional thing, you could screw a hook into the wall or wooden ledge on the left, and use a bungee cord or similar on the indoor door handle. #bodge
Cheers. Bungee is an option but I'd prefer something neater.
Can't you just stick a small length of timber batten between the jamb/stop and the face of the door that the hinge plates are screwed to?
@aggi started
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How far does it open?
If its just an occasional thing, you could screw a hook into the wall or wooden ledge on the left, and use a bungee cord or similar on the indoor door handle. #bodge