jdragon, yeah new guide pins were properly lubricated with silicone grease and copper grease added to the cradle. Sometimes I do think I can hear a somewhat dull sound when driving, but I'm not sure if this is in my head or not!
Gareth, I'm going to take the disc off again and have a look. I did give it a quick wire brush down at the time but I maybe did miss some rust on the hub surface. The wheel bearings was just an out of the box suggestion, as I'm totally stomped with this lol
AudiJackAvant, given how similar the parts you replaced are to mine, I'd say it's a good chance we may have the same issue. Crazy how difficult such a simple problem can become!
Cheers folks for the suggestions