thanks for the response.
I wasn't asking for an exact quote obviously just whether replacing with a thermo would be loads more expensive than just replacing with electric so I can work out which I can afford!
I currently have an old electric shower that needs replacing. I don't know whether to replace it with another electric shower or change to a thermostatic mixer shower as I have a combi boiler.
Does anyone know if it is a relatively easy job to change the shower so it runs off the boiler and how...