I am looking at buying this trailer http://www.amazon.co.uk/product-reviews/B007D2QWYQ/ref=dp_top_cm_cr_acr_txt?ie=UTF8&showViewpoints=1 but cant work out whether it can be attatched to a bike with disk brakes...
Yes. If you look at the photos. you'll see it attaches to the bike through the quick release skewer on the rear wheel. It's much the same as mine, as on this link in the USA...
http://www.amazon.com/gp/product/B001V687DY/ref=cm_ciu_pl_B001V687DY_mo24IVH0I9JQT8T