At last - I think I have resolved the problem.
Info for anyone in a similar situation.
Power shower supplied by Wickes 4 years ago identified as a Watermill Osprey ll 4500 manual. Now obsolete but Showerdoc.com purchased all remaining spare parts about a year ago.
I was able to...
Thanks for that info. Showerdoc.com told me it was a Superjet. They are advertising spares for the Osprey. I assume the manual valve is the cause of the drip.
It's badged as a Wickes power shower product code 410031. I believed it was in fact a Triton Aquatronic. Wickes service helpline say it was supplied to them by Watermill Products as a model S60.
I have a power shower about 4 years old which is leaking from the shower head. It was supplied by Wickes who tell me that it is now obsolete and no spares are available so looks like I will have to replace it. I am told that the SupaJet 100 is a suitable replacement. Important that I can match...