Sounds like a wheel bearing, I had this on the front n/s of our R just before Christmas. No issues with VW replacing it under warranty, dropped car off in morning and all sorted by lunchtime.
Had the same problem with mine, the Bridgestones were down to 3mm as soon as they were replaced the noise went completely. It was that loud before it was uncomfortable on long trips and did sound like a wheel bearing but slightly changed tone on different road surfaces.
Had my tyres checked out at a reliable garage today - tyres all absolutely fine but both offside wheels slightly buckled. Nothing too much to worry about but a pot hole could've damaged a bearing. Brakes were all fine as in no dragging so is looking highly likely to be a wheel bearing. Got to wait another 11 days though for VW to take a look.