Ok so I've looked up a few youtube videos/read some other threads on how to fix this problem. I've literally just spent 2/3 hours trying to sort it out to no avail. I know it's supposed to be "one of the most difficult adjustments" to make on a bike but this is taking the piss! I set the derailleur at the correct height, and then 2mm (which was what was recommended in a video) between the chain and the derailleur on the lowest front ring. The next step of the video was to adjust the high or low screws to move the derailleur in or out thus away from the chain and it doesn't grind. That is where my problem is. When I turn the screws either way I can't for the life of me see any movement whatsoever. Am I doing something wrong? Or is there something wrong with my bike? Anyone able to help me out here? If I need to provide some other info please let me know... newbie to fixing my own bike! If it's any use, the bike is a BTwin Triban 3. Hopefully someone's able to help me out.... I'm off to bed (with sore hands!) Thanks!