Careful....tensioner arms have been known to snap if pried to much/far!

Checked the VCU tonight just to be sure. It is fine.
Checked the power-steering cap. All clean there. Poked a wire up the breather but nothing much in there.
Checked the idler but no movement.

Couldn't get it to do it tonight and then gave up and as I reversed into the drive it did it faintly! Could only get it to do it once or twice while reversing back and left. Think it is a case of watch and wait. Probably worrying about nothing.

Cheers,

J