[JohnM]

Problem now sorted thanks. Managed to get pump out form the bottom of the machine. (Odd bayonnet fitting) Could find nothing wrong with it ... nor could I find any glass ... but in the process of working on the machine it could have moved on! Reassembled ... now the embarassment ... assuming I had achieved nothing, got a repair guy in who found it faultless and it's still working fine. Good guy as he charged a nominal fee.

This seems to be a common problem ... acknowledged in that the motor apparently reverses up hitting a foul up. They are quite easy to remove.
apart from learning this, found e-fix supplied part at fraction of Bosch. Found a call out from Bosch would have required me to remorgage my house!