Machine banging when in fast spin

If the noise is coming from inside the drum then it will be the bear ings if this machine is less than 3years old then this is what bust hotpoint they changed the bearing setup and put a spring on it which its the spring that is the complete failure u need to take the complete drum out strip this put the new bearing set in but without the spring this wil put at least 2-3years on the bearings its a big job and costs about £120 to fix u r accually better off buying a completely different washer no good are hotpoints anymore m8

Had the same problem found it to be one of the struts holding the drum uo,like a shock absorber.take the rear cover of and underneath the drum are two struts,if one,s sagging it will throw the drum against the side causing the banging.
easy fix just unbolt and replace.second hand about ten to fifteen for a pair.
hope this helps.