Hi all thought it might be helpful to someone,, bought my LR L322 2006 last year, after a month or so noticed a vibration sound and could feel it on steering wheel, this was intermittent,, since the tyres were not good had all replaced with new ones and had wheel balancing done.. Still had the vibrating at speed of 40-50 mph feels like your driving on corrugated surface,, didn’t feel safe to drive, took it in to our local RR garage (not dealer) they said it was the rear callipers were locking on and causing the vibration.

It strangely stoped vibrating at speeds above 50 mph

had both rear callipers and break pads changed all good,, never had that vibration come back 👍