Ironically, I stumbled upon the answer to my problem on this site, followed the instructions (many thanks 'j ahmed') & we are up and softening washloads again
If like myself you are also looking for a step-by-step guide to fixing this problem, visit... http://www.howtomendit.com/answers.php?id=126103
Note: I didn't need the stage 'Then undo the big bar that supports the drum springs (4 x TORX)...' & 'Remove the two pipes...' was actually 3, but I'd guess that I have a later version of this model.
Barry K., April 2010