Sounds like everything was made out of horse left overs from the glue factory. Just how far north do you live?
Until about 5pm today it was also 57 mm too long as well apparently ... Probably tell us it's made of chocolate next
that's what i was thinking too... it that flat face piece of wood is just planted on, i can replace it with a piece to accommodate the depth and the small lack of width of the door. bargain! is it just planted on?
... this is what I'm on about in another post ... The "liners"/"jamb" should be just strips that were nailed onto the main frame ... If you can prize them off and set them back in 15mm over you end up with the right depth of rebate for the door ....