hi again gareth, i totally agree with everything you have said..i too am frustrated that no one has actually said yes i know what the cause is.when i did the oil change(used ramps)i did not see any loose plastic...audi main dealers put both front lower curved arm bushes split mot failure.and other issues.but never told me about what was actually causing the thudding /flapping issue.first thing i said to halfords was that i have this thudding /flapping noise.they said we are not allowed to take it for a run to find out, and came back with the exact same faults as the main audi dealer had put.(i wonder if they share information on the internet)...thats when i questioned them about the noise i was experiencing and asked if doing the bushes would solve it.and of course they said they could not guarantee it would.and the other audi dealer said its the wheel bearing thats causing the noise.they said a wheel bearing can cause a thudding/flapping noise.if i knew for certain that this noise i am hearing can be rectified then i will gladly pay them the money.but have no confidence in either of their diagnosis. if someone on this forum have replaced both front lower curved arm bushes or replaced a front offside wheel bearing(without using a press)then i would gladly have a go myself.i have done things like timing/auxillary belt/brakes/discs etc.its just on this car i am struggling to find a decent jacking point without crushing anything.i do honestly really appreciate your input gareth kind regards