The E-number on the back is WAS32461GB/10.
Correct: no lights on the front.
Will follow your guidance.
You were right with your first thoughts....I connected the washing machine to another socket for convenience so I could try a multimeter as you suggested. I got a reading at the filter and the lights on the front panel lit up when I switched it on.
The fault is with the socket...and not the machine.
Thanks for your help!