Rolo Tomassi is a band from Sheffield, England, playing synth driven mathcore. Their name is taken from the fictional character in the film LA Confidential. On 22 September 2008, the band released their debut album, Hysterics, through Hassle Records.
The band formed in 2005. Not long after forming, the band had written some songs and immediately began to perform at local venues/pubs to small crowds. At this time, the band released some of their first material on to a 3 Track Demo CD which they could sell at the shows they were performing at. The demo CD-R was released under James Spence's (keyboardist/vocalist) independent label which he named "Mayday!".