Goldspoon, it is exactly that type of shower. I turned the cold water flow pipe to virtually off and it didnt make it any better, infact I think it was worse. I've turned the thermostat up on my immersion tank now to see if that helps but I'm not convinced.
Just moved into a new flat and I have a H2O hydro powered shower. It doesnt seem to get hot enough even when the water from the tap is very hot. Any ideas? Do I need to call a plumber?