Most likely they are the ball-o-fix valves on the tap supply so yes. You will probably need some kind of tap spanner to undo the nut behind the sink bowl though.
Cheers. I've got the spanner to undo the nut holding the tap to the sink. Got it before when the builders who put all together didn't tighten it down. Right, off to the local plumbing shop.
Most likely they are the ball-o-fix valves on the tap supply so yes. You will probably need some kind of tap spanner to undo the nut behind the sink bowl though.