Dude, you are a star (I hope),
So first thing we did was check the pressure switch and it was working fine, followed the wires back and they were fine. Jumped them together like you suggested and nothing.
Tested the live wires on the heater and no voltage so we traced everything back and there was a loose connection. Now the heater light has come on the top controls and the heater element is at 230V ! Hurrahhhh.
Its pulling just over 12amps now rather than 4 before so thats a good sign.
Hopefully in a few hours it will have gone up in temp.
Thanks again for you assistance on this, You have been a huge help