Posted by Phil Whitley on 27/09/2017 17:29:13:
… If you open the machine door, and grasp the tub top and bottom and try to lift it up and down, you can usually feel the movement if the spider has failed, try turning 1/3 of a turn and try again.the spider legs are where the vanes are inside the tub. Also when the spider has failed, they usually make quite a din, especially when spinning, and sometimes self destruct almost instantly. If there is no play detectable, and no noise, it may be that the machine has been overloaded at sometime, or run with a blocked pump screen, and gone into spin with a wet unbalanced load and got slightly bent. If there is no detectable play, and no noise or heavy vibration, and the inner tub is not catching on the door gasket I would carry on using it. It is a Miele after all!
.
Useful description, thanks Phil 
However; As I said in the opening post … there is no evidence of bearing failure, or of looseness.
It is conceiveable that the shaft is bent; but it is not evident … the drum appears simply to have been displaced radially.
The noise and vibration are apalling; and yes, the drum is intermittently contacting the door gasket.
I don't really understand what has happened, but I'm pretty sure something significant is amiss !!
[ forensic inspection to follow in due course ]
MichaelG.