LFO were formed after Hill and Gez Varley and Bell met while studying at Leeds University. They made a track together, and sent it to Nightmares on Wax. The demo of this song became a hit in the clubs, and led to the track being released by Warp Records in 1990. It reached number 12 in the singles charts, and was featured on the duo's debut album 'Frequencies' from the following year. I've owned my CD copy of that album for about a year or so now, and must admit to only playing it twice. That's what happens when you have so much music to listen to... But tonight, I will play it again in memory of Mark Hill, and because it's a bloody good record.
Hill also collaborated and remixed many artists including Bjork, and also produced Depeche Mode's 'Exciter' LP from 2001. He continued LFO by himself after Varley quit in 1996.