Printing with margins

Because of my choice of binding I have to allow for a 30mm margin when it comes to printing my final. I went through and did so on my indesign file, unfortunately this moved everything around and messed up my grid slightly. I tried to talk to the printers at Ink about other options but this is what they suggested to do. Hopefully my grid will still appear as it should.

I am printing on off-white 130gsm.

Here is a screenshot with the margin, the image from the previous page has come through but will be cut off after printing in the trimming process.