Not had chance to get them looked at, but both front units are making quite a lot of noise over bumps/ pot holes,they sound as if they are vibrating/drumming, car still handles ok and units are quiet on smooth roads. Any ideas on what is wrong.

 

That was the exact reason why I took my teins off pal coilovers are more suited to the track IMO and not freindly at all on every day roads that are full of dreaded bumps and potholes that's just how they are unfortunately there was nothing wrong with mine but still nocked on every bump