E39 - rubbing noise from NS rear wheel

Any suggestions what might be causing a "rubbing noise" from the rear wheel? Tyres are not new. The noise is definitely speed-related. It
doesn't alter whether brakes are applied or not (neither the hand brake). A cursory inspection doesn't show anything visible that the wheel might be rubbing against - was going to run it down to the local kiwk fit and get them to stick on a ramp but just thought I'd seek opinions/thoughts on here too.
--

jeremy
['01 BMW 530iA SE Touring]
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
waffled on about something:

Not 100% sure on the E39, but do you have 2 sets of brakes on the rear disks? i.e. the pads for the normal foot brakes, and shoes for the hand brake?
If so, does the noise change when the hand brake is applied?
Dodgy.
--
MUSHROOMS ARE THE OPIATE OF THE MOOSES

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

No change - handbrake or footbrake applied - am thinking possibly wheelbearings but would expect that to be a consistent rumble possibly creating resonance inside the car. Next suggestion please ;)
--

jeremy
['01 BMW 530iA SE Touring]
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.