Finally got the wiring to pump figured out & it seems it is working perfectly we even got the vacuum to work the actuator all fine. Next step was to test the ECU which was only showing an output of 0.3 to 0.8 volts which is why the T4 said low power to pump. Second hand ECU ordered so will let you know the outcome.
Well the ECU arrived from ebay so I fitted it & gave the cruise a try, but you guessed it, still doesn't work so it's back to the drawing board but I'm running out of ideas.