Clicking on front driveshaft

[Lincspoacher]

Started yesterday but quickly got louder, sounds like when a kid puts card in there bike spokes, its coming from the top of the drivers side front drive shaft under the centre cover

[X5Sport]

First thought is a failing Constant Velocity Joint (CVJ) at that end of the shaft.

[Horizon]

[quote="Lincspoacher"]
Started yesterday but quickly got louder, sounds like when a kid puts card in there bike spokes, its coming from the top of the drivers side front drive shaft under the centre cover
[/quote

As mentioned it could be the CV joint, but als the diff. The fact it is deteriorating so quickly would cause me to get it checked out as a possible as either failing whilst out away from home will result in the car having to be recovered.
Have you got roadside recovery ?
There's been a few members on here had diffs go in the past, so wouldn't want you to be stranded miles from home.