Firstly thanks for your replies . When I took car into garage they road tested it themselves . Then put it on ramp & checked fluid levels +checked for play on wheels non found . I recently did a motorway run (about 15 mile each way , I felt the wheels all round car none of them were hot at all .I have tried coasting with car out of gear, no differance,tried lock to lock ,no difference either , guy at garage said leave it till it gets worse but don't want it to go all at once (you know it will happen when you need it most lol).I can't make my mind up if it's a diff noise or wheel bearing noise ,it's a type of dry running noise if that makes sense?.thank's