Noise when coasting or taking foot off brakes

[Dee_S]

Over the past couple of weeks I've developed a strange noise on my '06 RX400h. When I take my foot off the brake pedal I get a clunk, I think from my o/s/f wheel. This is followed by a noise that sounds a bit like something is rubbing. I also get the noise if I decelerate, but it disappears when I brake or apply throttle. Its just passed the MOT, but I have had a bit of a sticky foot/handbrake and wondered now if it is sticking. 

Is anyone able to offer any ideas as to what this may be? 

[olliesgrandad]

Once had a rubbing noise that was a stone caught between the backing plate and brake disc.... Had a rubbing noise on A BMW Z3 that was the entire brake pad parted from the backing on a rear brake  caliper, fortunately it didn't fall out or that might have been a little entertaining. It was a genuine BMW part.