Yep. The car has been making a creaking/knocking type of noise for just over a week. It was diagnosed as worn discs by a local independent and on inspection I found the discs had a groove worn into the back side on both the n/s and o/s. I swapped the discs and pads and yet the problem is still there. I noticed this morning the discs were very hot after a short journey and when I jacked it up I could feel the resistance straight away. Thanks for your reply Chris :)