It's fixed and cost nothing! Well nearly nothing 'cos I'm retired and my grown up kids like me to fix things!
So, some solder from our local Maplins.
Although I'd bought some new brushes. (Ace Domestics supplied new brushes at v good price and good delivery), But Then I found that the old brushes had lots of life in them, perhaps I should have checked first and not relied on my expert friends who said that they knew what the problem was)
Water pressure switch was OK.
So I looked at the Main circuit board on LHS of m/c (from the back).
The problem is always how do you test components soldered to a printed circuit.
Luckily, and not surprisingly, lots of Amps thru' the connection between the relay that switches power to the motor had burnt out at the point where its pin was soldered to the board. How clever is it to put serious amps thru' a PCB?
=A32.99 at Maplins for some solder (I couldn't find mine), a bit of work with my strong spectacles and a soldering iron and the failing joint was jumped.
All OK, daughter's children's wash done OK this evening.
This Whirlpool machine is reasonably well built, the motor is ace! The motor is so good I couldn't bear to to send it the the dump!
But, for want of a little sorting out this m/c would be en-route to the tip.
Cheers