The water pressure drops dramatically when the temperature dial is turned above 5. The shower works on cool and low settings but when you turn the heat up to high (and above 5) the electics trip. How can this be rectified?
Your shower has two heating elements within the tank. It's likely that one has failed and you need to replace the tank. This can be purchased direct from Mira Showers by ringing 0844 571 5000 or you can ask one of their engineers to fit it for you