Im having a problem with my Clubman, its a harsh grinding sound and vibration when the clutch pedal is pushed down. It started thismorning on the way to work, and seems to go away after driving the car for about 10min. It has never done this before, and I find it weird that it would happen all of a sudden. I jacked the car up and had a look around, the oil in the gearbox is fine, and there is plenty of fluid in the clutch reservoir.

I took a video for you guys, you can hear the grinding when I press the clutch, and when putting the car into gear.
Im thinking it might be the thrust bearing, but I dont know for sure. If anyone could offer some help or info on what might be causing this grinding that would be great.
Cheers
Ryan