Well here's a picture of the on/off and temp control if that's what you mean ... then there's the shower head at the top. Will try to AL site but pretty sure I'll get the minimum call out charge and then a whacking price but maybe not, £60 doesn't sound bad
I've a annoyingly persistent dripping (Aqualisa) shower. Would really like to avoid the ridiculous call out charges. Please PM me if interested or know someone who would be at a fair price