knocking or rattling

Evening All, Looking for some input on a knocking noise coming from the front of the car... It's Not Engine related - certain about that. Typically happens on roads that have any form of uneven surface. Motorways / other Smooth roads (when you can find them) are fine. It's not specific to...

Yesterday I had front and rear Eibach anti-roll bars and Koni FSDs fitted to my LCR. However, since then there has been a knocking/rattling noise coming from the rear of the car. It doesnt occur all of the time, only when going over bumps. The garage also noticed this after they had fitted...