So drive over bumps in the road at about 40, and gently brake. Or keep foot on accelerator whilst braking with left foot? 
  
Edit: just read it again. Ill give it a go tomorrow and see if it goes away  just worried incase it snaps off and car explodes 
 
  
You should keep the speed and location to that where the noise occurs ... in my case that was at about 10 mph over the yellow zigzags outside a school. Left foot brake but also keep the accelerator pressed to maintain the speed 
  
Don't worry it's safe to drive with a knackered banana bar.