Noise is still there. It happens whether the car is hot or cold. Whether the clutch is pressed or just coasting. I've taken it to FATS motorsport and he couldn't work it out. Perhaps I just wait until it's next scheduled service at Subaru. It's very faint and hasn't affected anything that I've noticed. It's just one of those things that you pick up whilst driving and it really annoys until it gets fixed. Hmm.. sounds familiar