The water pressure downstairs is perfect but upstairs it's a nightmare.

The main bathroom has low pressure in the bath/shower but the sink has OK pressure for cold water but hot water is a little bit lower. The house has an ensuite upstairs with an electric shower which is fine (runs of cold water obv).

How can I improve the pressure of the bath tap without going into too much expense (water pump) or can I put in a second Electric shower. Someone once said that you couldn't have two electric showers but I just don't know if its true or not.

Confused_again

Although you sense the pressure what you have is actually reduced volume. Your shower has reduced volume due to either a somewhat clogged shower head or mixing valve. Lets start by removing the shower head, did the pressure/volume improve?