Locks that work

Wasn't sure where to post this, but I have a kyrptonite new york m-18 lock (couldn't fit the mini fahg around my frame and stupid deep section rear wheel, ha ha) I was wondering if anyone had any advice for ways to transport this large, heavy lock on my frame, specifically for times when I don't need my backpack for anything else.

You could use a Trelock ZB403 3 point bracket for U locks of 14-25 mm diameter. I´m not sure if you can get the bracket in UK, but it´s worth a try. You fix the bracket to the rear carrier: http://www.trelock.de/web/_img/produkte/downloads/ZB_403_Montage_21.pdf
Edit: You can buy it here: http://www.bicycleworkshop.co.uk/products.php?plid=m2b0s93p180