You can crop the PDF and/or scale at print in Acrobat. Which is what I would do in your situation. If you have wider margins inside, for example, when you crop you can apply the crop to all left pages, etc.
Thank you Mike. I have tried to crop it a few times and it comes up with the message 'Page Size cannot be reduced'. Any clues?
Are you using Acrobat to crop?
... 'Page Size cannot be reduced'. Any clues?
That message appears when using the "Other Page Size" area with Acrobat's crop dialog (which is for inceasing the page size).
Enter values in the Left, Right, Top, Bottom fields of the Crop dialog; the finished dimension will be noted below the thumbnail in that dialog.
Ah...yes. I did assume a bit. Open the print production area and use the set page boxes. Off the top.of my head using my phone to reply anyway. Might be called something slightly different.