Electric Shower: Water coming out even when switched off

Hi Folks;
Would anybody have and idea on the problem below we are having with our
Triton Electric Shower?

- After switching off the shower as normal, water continues to come out of the hose, not a lot but more than a trickle. I had to turn the water going to the shower off at a level in the attic;;


Any help greatly appreciated

Thanks
B

Same happend with mine before, I think it's a seal or something inside. It was still under warranty so was repaired.

could also be the solenoid,if its under warrenty it will be sorted but if not and it is teh solenoid then its not too expensie to replace