It would appear in the end it was the water, I had over tightened the olive and it was restricting the water.
Irs working now, the neon on the pull switch has also stopped acting up. Now to put your minds at ease, I will get the switch checked over by a spark.
Thank you for your responses.
I didn't just way in without any knowledge. I do have some knowledge of electrics as my father is a spark but he is not available to come round until next week.
All electrics etc are already installed and have been for many years. I had an electric shower...
I have just installed a Mira Go electric shower in my house
I wired the shower unit and plumed it in. I turned the power and water back on to test the shower. I pulled the cord for power to the shower but the led did not come on, I switched the trip for the shower on and off on the fuse board...