Loud banging the machine makes extremely loud bangs inside the machine when its spinning i think the drum turns because i can do so with my hand but the banging is surely not normal?

Several possibilities for noise. check concrete balance wieghts at top and bottom of washer, make sure they are not loose.
Check drum restraint spring(s) are not broken.
Check suspension legs for wear.
Check for loose motor fixings.
Finally, remove drum belt, and spin drum by hand, tjhere should be noise from bearings, if it feels rough or is rumbling , then main bearings have failed.
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Thanks.