What are the strange rattles coming from under my car?

I own a 2014 SEAT Ibiza ST and when I drive down a road with an uneven surface, whether it be potholes, draincovers or speed bumps, I get a rattle noise from somewhere underneath the car. I have checked to see if the exhaust is loose, but it's not, so was wondering if it could be a suspension issue? I can even hear it over my radio. However on a smooth surface, like a good A road or a motorway they is no noise.

Asked on 11 June 2017 by Mr Hatton

Answered by Honest John
Could be the rear suspension striking the exhaust system under compression. Just slackening off the exhaust joints and twisting slightly can fix this. Alternatively, might be a suspension bush and the most likely culprit is an anti roll bar sleeve bush dropped out.
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