UFC 70: Nations Collide was the second UFC event held in the United Kingdom, and the first in Manchester on Saturday, 21 April 2007. UFC 70 was also only the seventh UFC event held outside the United States, and the first since UFC 38. The card was broadcast live on pay-per-view in the United Kingdom and Ireland on Setanta Sports.

The Ultimate Fighting Championship (UFC) is an American mixed martial arts (MMA) promotion company based in Las Vegas, Nevada. It is owned and operated by TKO Group Holdings, a majority owned subsidiary of Endeavor Group Holdings. It is the largest MMA promotion in the world as of 2023. It produces events worldwide that showcase 11 weight divisions and abides by the Unified Rules of Mixed Martial Arts. As of 2022, it had held over 600 events. Dana White has been its president since 2001 and CEO since 2023. Under White's stewardship, it has grown into a global multi-billion-dollar enterprise.