[Deadloak]

I drove the technician in the car this morning, although it only sounded mildly like the noise (typical). He took is straight into the shop and replaced the nearside and offside parts as fro the XC60 fix (I'll post the specifics once the manager has emailed them). I'll wait a few days to ensure this is the definative fix before doing so. Fingers crossed as the technician said the offside was indeed corroded, hence the noise.