Bloody Hell, everything is happening with the car for some reason! Today when driving on the motorway, I noticed that once I got to higher speeds, for example 70MPH, there was a loud drum roll type/fast knocking type sound coming from under the car. I am suspecting shock absorbers or some suspension type problem? Anyone confirm. I can add that it seemed much more noticeable if there was a bend in the road, even an average small sized bend.